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1.
Pest Manag Sci ; 80(5): 2294-2305, 2024 May.
Article in English | MEDLINE | ID: mdl-37035871

ABSTRACT

BACKGROUND: The pollen beetle (Brassicogethes aeneus) causes significant yield loss in oilseed rape (Brassica napus). Predicting population changes remains a scientific challenge, especially since its phenology and abundance varies dramatically over space and time. We used generalized additive models to investigate the long-term trends in pollen beetle annual, seasonal and monthly counts from Rothamsted 12.2 m suction-traps. We hypothesised that the beetle's abundance is positively related to the area of oilseed rape at a national and regional level. We used random forest models to investigate the inter-generational relationship within years. RESULTS: Although Brassicogethes aeneus annual counts and area of oilseed rape grown in the UK both increased by 162% and 113%, respectively, over the time period studied, they were not significantly related. The size of the immigrating pollen beetle population (up to 1 June) can be explained both by the size of the population in the previous summer and prevailing winter temperatures, indicating a positive feedback mechanism. CONCLUSION: Currently, pollen beetle numbers continue to increase in the UK, meaning that control issues may persist. However the relationship between counts in spring, during the susceptible phase of the crop, and counts in the previous summer indicates that it may be possible to forecast the counts of the spring migration of Brassicogethes aeneus a few months in advance using suction-trap samples, which could aid decisions on control options. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.


Subject(s)
Brassica napus , Coleoptera , Animals , Pest Control , Seasons , United Kingdom
2.
Insect Conserv Divers ; 16(2): 173-189, 2023 Mar.
Article in English | MEDLINE | ID: mdl-38505358

ABSTRACT

Entomology is key to understanding terrestrial and freshwater ecosystems at a time of unprecedented anthropogenic environmental change and offers substantial untapped potential to benefit humanity in a variety of ways, from improving agricultural practices to managing vector-borne diseases and inspiring technological advances.We identified high priority challenges for entomology using an inclusive, open, and democratic four-stage prioritisation approach, conducted among the membership and affiliates (hereafter 'members') of the UK-based Royal Entomological Society (RES).A list of 710 challenges was gathered from 189 RES members. Thematic analysis was used to group suggestions, followed by an online vote to determine initial priorities, which were subsequently ranked during an online workshop involving 37 participants.The outcome was a set of 61 priority challenges within four groupings of related themes: (i) 'Fundamental Research' (themes: Taxonomy, 'Blue Skies' [defined as research ideas without immediate practical application], Methods and Techniques); (ii) 'Anthropogenic Impacts and Conservation' (themes: Anthropogenic Impacts, Conservation Options); (iii) 'Uses, Ecosystem Services and Disservices' (themes: Ecosystem Benefits, Technology and Resources [use of insects as a resource, or as inspiration], Pests); (iv) 'Collaboration, Engagement and Training' (themes: Knowledge Access, Training and Collaboration, Societal Engagement).Priority challenges encompass research questions, funding objectives, new technologies, and priorities for outreach and engagement. Examples include training taxonomists, establishing a global network of insect monitoring sites, understanding the extent of insect declines, exploring roles of cultivated insects in food supply chains, and connecting professional with amateur entomologists. Responses to different challenges could be led by amateur and professional entomologists, at all career stages.Overall, the challenges provide a diverse array of options to inspire and initiate entomological activities and reveal the potential of entomology to contribute to addressing global challenges related to human health and well-being, and environmental change.

3.
Glob Chang Biol ; 28(16): 4765-4774, 2022 08.
Article in English | MEDLINE | ID: mdl-35590459

ABSTRACT

There is widespread concern that species will fail to track climate change if habitat is too scarce or insufficiently connected. Targeted restoration has been advocated to help species adapt, and a "conductance" metric has been proposed, based on simulation studies, to predict effective habitat configurations. However, until now there is very little empirical evidence on how the configuration of habitat is affecting expansion at species' cool range margins. We analysed the colonisation events that have occurred in continuously monitored trap locations for 54 species of southerly distributed moths in Britain between 1985 and 2011. We tested whether the time until colonisation was affected by attributes of each species, and of intervening landcover and climate between the trap and the baseline distribution (1965-1985). For woodland species, the time until colonisation of new locations was predicted by the "conductance" of woodland habitat, and this relationship was general, regardless of species' exact dispersal distances and habitat needs. This shows that contemporary range shifts are being influenced by habitat configuration as well as simple habitat extent. For species associated with farmland or suburban habitats, colonisation was significantly slower through landscapes with a high variance in elevation and/or temperature. Therefore, it is not safe to assume that such relatively tolerant species face no geographical barriers to range expansion. We thus elucidate how species' attributes interact with landscape characteristics to create highly heterogeneous patterns of shifting at cool range margins. Conductance, and other predictors of range shifts, can provide a foundation for developing coherent conservation strategies to manage range shifts for entire communities.


Subject(s)
Climate Change , Ecosystem , Computer Simulation , Forests , Geography
4.
Rev Lat Am Enfermagem ; 29: e3470, 2021.
Article in English, Portuguese, Spanish | MEDLINE | ID: mdl-34468626

ABSTRACT

OBJECTIVE: to develop and implement an online education resources to address a gap in nursing education regarding the concept of cultural humility and its application to healthcare encounters with persons who identify as lesbian, gay, bisexual, transgender, queer, intersex (LGBTQI) or Two-Spirit. Improved understanding of LGBTQI and Two-Spirit community health issues is essential to reducing the healthcare access barriers they currently face. METHOD: an online educational toolkit was developed that included virtual simulation games and curated resources. The development process included community involvement, a team-building meeting, development of learning outcomes, decision-point maps and scriptwriting for filming. A website and learning management system was designed to present learning objectives, curated resources, and the virtual games. RESULTS: the Sexual Orientation and Gender Identity Nursing Toolkit was created to advance cultural humility in nursing practice. The learning toolkit focuses on encounters using cultural humility to meet the unique needs of LGBTQI and Two-Spirit communities. CONCLUSION: our innovative online educational toolkit can be used to provide professional development of nurses and other healthcare practitioners to care for LGBTQI and Two-Spirit individuals.


Subject(s)
Education, Distance , Nursing Care , Sexual and Gender Minorities , Female , Gender Identity , Humans , Male , Sexual Behavior
5.
Rev. latinoam. enferm. (Online) ; 29: e3470, 2021. graf
Article in English | LILACS, BDENF - Nursing | ID: biblio-1289761

ABSTRACT

Objective: to develop and implement an online education resources to address a gap in nursing education regarding the concept of cultural humility and its application to healthcare encounters with persons who identify as lesbian, gay, bisexual, transgender, queer, intersex (LGBTQI) or Two-Spirit. Improved understanding of LGBTQI and Two-Spirit community health issues is essential to reducing the healthcare access barriers they currently face. Method: an online educational toolkit was developed that included virtual simulation games and curated resources. The development process included community involvement, a team-building meeting, development of learning outcomes, decision-point maps and scriptwriting for filming. A website and learning management system was designed to present learning objectives, curated resources, and the virtual games. Results: the Sexual Orientation and Gender Identity Nursing Toolkit was created to advance cultural humility in nursing practice. The learning toolkit focuses on encounters using cultural humility to meet the unique needs of LGBTQI and Two-Spirit communities. Conclusion: our innovative online educational toolkit can be used to provide professional development of nurses and other healthcare practitioners to care for LGBTQI and Two-Spirit individuals.


Objetivo: desenvolver e implementar uma ferramenta educacional online para atender a uma demanda na educação de enfermagem a respeito do conceito de humildade cultural e sua aplicação às consultas e cuidados de saúde das pessoas que se identificam como lésbicas, gays, bissexuais transgêneros, queers, intersexuais (LGBTQI) ou Dois-Espíritos. Um melhor entendimento das questões de saúde da comunidade LGBTQI e Dois-Espíritos é essencial para reduzir as atuais barreiras que eles encontram no acesso aos cuidados de saúde. Método: foi desenvolvido um kit de ferramentas educacionais online que inclui jogos de simulação virtual e recursos selecionados. O processo de desenvolvimento abrangeu envolvimento comunitário, encontro para formação de equipe, desenvolvimento de desfechos de aprendizagem, mapas de pontos de decisão e escrita de roteiros para gravações. Um site-sistema de gerência da aprendizagem foi desenhado para apresentação dos objetivos de aprendizagem, recursos selecionados e os jogos virtuais. Resultados: o Kit de Ferramentas de Enfermagem para Orientação Sexual e Identidade de Gênero foi criado para a promoção da humildade cultural na prática de enfermagem. O kit de aprendizagem foca nos encontros que usam humildade cultural para atender às necessidades específicas das comunidades LGBTQI e Dois-Espíritos. Conclusão: nosso inovador kit de ferramentas educacionais online pode ser usado para promover o desenvolvimento profissional de enfermeiros e outros profissionais da saúde nos cuidados aos indivíduos LGBTQI e Dois-Espíritos.


Objetivo: desarrollar e implementar una herramienta educativa en línea para satisfacer una demanda en la educación de enfermería sobre el concepto de humildad cultural y su aplicación a las consultas y atención de la salud de las personas que se identifican como lesbianas, gais, bisexuales, transgénero, queer, intersexuales (LGBTQI) o Dos Espíritus. Una mejor comprensión de los problemas de salud de la comunidad LGBTQI y Dos Espíritus es esencial para reducir los obstáculos que enfrentan actualmente para acceder a la atención médica. Método: se desarrolló un kit de herramientas educativas en línea que incluye juegos de simulación virtual y recursos seleccionados. El proceso de desarrollo incluyó la participación de la comunidad, reuniones para la formación de equipos, desarrollo de resultados de aprendizaje, mapas de puntos de decisión y redacción de guiones para grabaciones. Se diseñó un sitio-sistema de gestión del aprendizaje para presentar los objetivos del aprendizaje, los recursos seleccionados y los juegos virtuales. Resultados: se creó el Kit de Herramientas de Enfermería para la Orientación Sexual y la Identidad de Género para promover la humildad cultural en la práctica de la enfermería. El kit de aprendizaje se centra en reuniones que utilizan la humildad cultural para satisfacer las necesidades específicas de las comunidades LGBTQI y Dos Espíritus. Conclusión: nuestro innovador kit de herramientas educativas en línea se puede utilizar para promover el desarrollo profesional de enfermeros y otros profesionales de la salud para el cuidado de personas LGBTQI y de Dos Espíritus.


Subject(s)
Humans , Male , Female , Sexual Behavior , Patient Simulation , Education, Distance , Culturally Competent Care , Sexual and Gender Minorities , Gender Identity , Nursing Care
6.
J Contin Educ Nurs ; 51(9): 412-419, 2020 Sep 01.
Article in English | MEDLINE | ID: mdl-32833031

ABSTRACT

BACKGROUND: Current education lacks lesbian, gay, bisexual, transgender, questioning, intersex, and two-spirit (LGBTQI2S) content for health care providers (HCPs). Providing HCPs with understanding of LGBTQI2S health issues would reduce barriers. The Innovative Thinking to Support LGBTQI2S Health and Wellness trainee award supported the development of a website with virtual simulation games (VSGs) about providing culturally humble care to LGBTQI2S individuals to address this need. METHOD: An online educational toolbox was developed that included VSGs and resources. Development processes included a visioning meeting, development of learning objectives, and using a decision-point map for script writing. Bilingual VSGs were filmed, and the website was developed. RESULTS: The Sexual Orientation and Gender Identity Nursing Toolkit was created to advance cultural humility in practice. Learning modules focus on encounters using cultural humility to meet the unique needs of the LGBTQI2S community. CONCLUSION: Our innovative educational toolkit can be used to provide professional development of nurses and other HCPs to care for LGBTQI2S individuals. [J Contin Educ Nurs. 2020;51(9):412-419.].


Subject(s)
Education, Nursing , Sexual and Gender Minorities , Transgender Persons , Female , Gender Identity , Humans , Male , Sexual Behavior
7.
Evol Appl ; 13(5): 1009-1025, 2020 May.
Article in English | MEDLINE | ID: mdl-32431749

ABSTRACT

Genetic diversity is the determinant for pest species' success and vector competence. Understanding the ecological and evolutionary processes that determine the genetic diversity is fundamental to help identify the spatial scale at which pest populations are best managed. In the present study, we present the first comprehensive analysis of the genetic diversity and evolution of Rhopalosiphum padi, a major pest of cereals and a main vector of the barley yellow dwarf virus (BYDV), in England. We have used a genotyping-by-sequencing approach to study whether (a) there is any underlying population genetic structure at a national and regional scale in this pest that can disperse long distances; (b) the populations evolve as a response to environmental change and selective pressures; and (c) the populations comprise anholocyclic lineages. Individual R. padi were collected using the Rothamsted Insect Survey's suction-trap network at several sites across England between 2004 and 2016 as part of the RIS long-term nationwide surveillance. Results identified two genetic clusters in England that mostly corresponded to a North-South division, although gene flow is ongoing between the two subpopulations. These genetic clusters do not correspond to different life cycle types, and cyclical parthenogenesis is predominant in England. Results also show that there is dispersal with gene flow across England, although there is a reduction between the northern and southern sites with the south-western population being the most genetically differentiated. There is no evidence for isolation by distance and other factors such as primary host distribution, uncommon in the south and absent in the south-west, could influence the dispersal patterns. Finally, results also show no evidence for the evolution of the R. padi population, and it is demographically stable despite the ongoing environmental change. These results are discussed in view of their relevance to pest management and the transmission of BYDV.

8.
Creat Nurs ; 26(2): 118-124, 2020 May 01.
Article in English | MEDLINE | ID: mdl-32321796

ABSTRACT

Design thinking methodology is a collaborative strategy with the potential to create innovations. Design thinking is being used increasingly in health care. Design jams are interdisciplinary events that bring together experts and community members to collaborate on creative solutions to health-care problems. This article describes the design thinking process and includes reflection on the authors' participation in a design jam event aimed to address the knowledge-to-action gap that exists in health care for (LGBTQI2S) people.


Subject(s)
Attitude of Health Personnel , Curriculum , Education, Nursing/organization & administration , Gender Identity , Nursing Care/psychology , Sexual and Gender Minorities/psychology , Students, Nursing/psychology , Adult , Female , Humans , Male , Young Adult
9.
Insect Conserv Divers ; 13(2): 115-126, 2020 Mar.
Article in English | MEDLINE | ID: mdl-32215052

ABSTRACT

Although we have known anecdotally that insects have been declining in Great Britain for more than 100 years, insect declines have only been statistically estimated over the last 20 years. Estimation of the rate of those declines is still hotly debated, fuelled by a lack of standardised, systematically collected data.More than 24 million individual moths and aphids collected from 112 light traps and 25 12.2 m suction-traps, respectively, were analysed using mixed models. Our objective was to estimate the long-term trends in both groups based on annual totals recorded every year between 1969 and 2016.The models showed that two paradigms existed: Over 47 years, long-term linear trends showed that moths had declined significantly by -31%, but short-term trends indicated that there were periods of significant decline and recovery in most decades since the 1960s. Conversely, despite aphid annual totals fluctuating widely, this group was in a steady state over the long-term, with a non-significant decline of -7.6%. Sensitivity analysis revealed that moth trends were not driven by a group of abundant species, but the sign of the overall aphid trends may have been driven by three of the most abundant species.The spatial extent of moth trends suggests that they are extremely heterogeneous. Uniquely, moth declines were different among several habitat types, with robust significant declines found in coastal, urban and woodland habitats, but notably not in agricultural, parkland and scrubland habitats. Conversely, aphid trends showed spatial synchrony extending to 338 km, albeit with local variation.

10.
J Appl Ecol ; 56(7): 1649-1660, 2019 Jul.
Article in English | MEDLINE | ID: mdl-31341330

ABSTRACT

Surveillance of adult Culicoides biting midge flight activity is used as an applied ecological method to guide the management of arbovirus incursions on livestock production in Europe and Australia.To date the impact of changes in the phenology of adult vector activity on arbovirus transmission has not been defined. We investigated this at two sites in the UK, identifying 150,000 Culicoides biting midges taken from 2867 collections over a nearly 40 year timescale.Whilst we recorded no change in seasonal activity at one site, shifts in first adult appearance and last adult appearance increased the seasonal activity period of Culicoides species at the other site by 40 days over the time period.Lengthening of the adult activity season was driven by an increase in abundance of Culicoides and correlated with local increases in temperature and precipitation. This diversity in responses poses significant challenges for predicting future transmission and overwintering risk. Policy implications. Our analysis not only shows a dramatic and consistent increase in the adult active period of Culicoides biting midges, but also that this varies significantly between sites. This suggests broad-scale analyses alone are insufficient to understand the potential impacts of changes in climate on arbovirus vector populations. Understanding the impact of climate change on adult Culicoides seasonality and transmission of arboviruses requires the context of changes in a range of other local ecological drivers.

11.
Glob Chang Biol ; 25(6): 1982-1994, 2019 06.
Article in English | MEDLINE | ID: mdl-30761691

ABSTRACT

Global warming has advanced the timing of biological events, potentially leading to disruption across trophic levels. The potential importance of phenological change as a driver of population trends has been suggested. To fully understand the possible impacts, there is a need to quantify the scale of these changes spatially and according to habitat type. We studied the relationship between phenological trends, space and habitat type between 1965 and 2012 using an extensive UK dataset comprising 269 aphid, bird, butterfly and moth species. We modelled phenologies using generalized additive mixed models that included covariates for geographical (latitude, longitude, altitude), temporal (year, season) and habitat terms (woodland, scrub, grassland). Model selection showed that a baseline model with geographical and temporal components explained the variation in phenologies better than either a model in which space and time interacted or a habitat model without spatial terms. This baseline model showed strongly that phenologies shifted progressively earlier over time, that increasing altitude produced later phenologies and that a strong spatial component determined phenological timings, particularly latitude. The seasonal timing of a phenological event, in terms of whether it fell in the first or second half of the year, did not result in substantially different trends for butterflies. For moths, early season phenologies advanced more rapidly than those recorded later. Whilst temporal trends across all habitats resulted in earlier phenologies over time, agricultural habitats produced significantly later phenologies than most other habitats studied, probably because of nonclimatic drivers. A model with a significant habitat-time interaction was the best-fitting model for birds, moths and butterflies, emphasizing that the rates of phenological advance also differ among habitats for these groups. Our results suggest the presence of strong spatial gradients in mean seasonal timing and nonlinear trends towards earlier seasonal timing that varies in form and rate among habitat types.


Subject(s)
Aphids , Birds , Butterflies , Moths , Animals , Climate Change , Ecosystem , Life Cycle Stages , Spatio-Temporal Analysis
12.
J Anim Ecol ; 86(2): 337-347, 2017 03.
Article in English | MEDLINE | ID: mdl-28095615

ABSTRACT

Populations of introduced species are often thought to perform differently, or experience different population dynamics, in their introduced range compared to their native habitat. Differences between habitats in climate, competition or natural enemies may result in populations with varying density dependence and population dynamics. We examined the long-term population dynamics of the invasive common wasp, Vespula vulgaris, in its native range in England and its invaded range in New Zealand. We used 39 years of wasp density data from four sites in England, and 23 years of data from six sites in New Zealand. Wasp population time series was examined using partial rate correlation functions. Gompertz population models and multivariate autoregressive state-space (MARSS) models were fitted, incorporating climatic variation. Gompertz models successfully explained 59-66% of the variation in wasp abundance between years. Density dependence in wasp populations appeared to act similarly in both the native and invaded range, with wasp abundance in the previous year as the most important variable in predicting intrinsic rate of increase (r). No evidence of cyclic population dynamics was observed. Both the Gompertz and MARSS models highlighted the role of weather conditions in each country as significant predictors of annual wasp abundance. The temporal evolution of wasp populations at all sites was best modelled jointly using a single latent dynamic factor for local trends, with the inclusion of a latent spring weather covariate. That same parsimonious multivariate model structure was optimal in both the native and invaded range. Density dependence is overwhelmingly important in predicting wasp densities and 'wasp years' in both the native and invaded range. Spring weather conditions in both countries have a major influence, probably through their impact on wasp colony initiation and early development. The population dynamics in the native range and invaded range show no evidence of cyclic boom-and-bust dynamics. Invasive species may not exhibit different population dynamics despite considerable variation in abundances throughout their distribution.


Subject(s)
Introduced Species , Wasps/physiology , Animals , Ecosystem , England , Models, Biological , New Zealand , Population Density , Population Dynamics
13.
J Appl Ecol ; 52(3): 686-695, 2015 Jun.
Article in English | MEDLINE | ID: mdl-27642189

ABSTRACT

Biodiversity is changing at unprecedented rates, and it is increasingly important that these changes are quantified through monitoring programmes. Previous recommendations for developing or enhancing these programmes focus either on the end goals, that is the intended use of the data, or on how these goals are achieved, for example through volunteer involvement in citizen science, but not both. These recommendations are rarely prioritized.We used a collaborative approach, involving 52 experts in biodiversity monitoring in the UK, to develop a list of attributes of relevance to any biodiversity monitoring programme and to order these attributes by their priority. We also ranked the attributes according to their importance in monitoring biodiversity in the UK. Experts involved included data users, funders, programme organizers and participants in data collection. They covered expertise in a wide range of taxa.We developed a final list of 25 attributes of biodiversity monitoring schemes, ordered from the most elemental (those essential for monitoring schemes; e.g. articulate the objectives and gain sufficient participants) to the most aspirational (e.g. electronic data capture in the field, reporting change annually). This ordered list is a practical framework which can be used to support the development of monitoring programmes.People's ranking of attributes revealed a difference between those who considered attributes with benefits to end users to be most important (e.g. people from governmental organizations) and those who considered attributes with greatest benefit to participants to be most important (e.g. people involved with volunteer biological recording schemes). This reveals a distinction between focussing on aims and the pragmatism in achieving those aims. Synthesis and applications. The ordered list of attributes developed in this study will assist in prioritizing resources to develop biodiversity monitoring programmes (including citizen science). The potential conflict between end users of data and participants in data collection that we discovered should be addressed by involving the diversity of stakeholders at all stages of programme development. This will maximize the chance of successfully achieving the goals of biodiversity monitoring programmes.

14.
J Anim Ecol ; 84(1): 21-34, 2015 Jan.
Article in English | MEDLINE | ID: mdl-25123260

ABSTRACT

Aphids represent a significant challenge to food production. The Rothamsted Insect Survey (RIS) runs a network of 12·2-m suction-traps throughout the year to collect migrating aphids. In 2014, the RIS celebrated its 50th anniversary. This paper marks that achievement with an extensive spatiotemporal analysis and the provision of the first British annotated checklist of aphids since 1964. Our main aim was to elucidate mechanisms that advance aphid phenology under climate change and explain these using life-history traits. We then highlight emerging pests using accumulation patterns. Linear and nonlinear mixed-effect models estimated the average rate of change per annum and effects of climate on annual counts, first and last flights and length of flight season since 1965. Two climate drivers were used: the accumulated day degrees above 16 °C (ADD16) indicated the potential for migration during the aphid season; the North Atlantic Oscillation (NAO) signalled the severity of the winter before migration took place. All 55 species studied had earlier first flight trends at rate of ß = -0·611 ± SE 0·015 days year(-1). Of these species, 49% had earlier last flights, but the average species effect appeared relatively stationary (ß = -0·010 ± SE 0·022 days year(-1)). Most species (85%) showed increasing duration of their flight season (ß = 0·336 ± SE 0·026 days year(-1)), even though only 54% increased their log annual count (ß = 0·002 ± SE <0·001 year(-1)). The ADD16 and NAO were shown to drive patterns in aphid phenology in a spatiotemporal context. Early in the year when the first aphids were migrating, the effect of the winter NAO was highly significant. Further into the year, ADD16 was a strong predictor. Latitude had a near linear effect on first flights, whereas longitude produced a generally less-clear effect on all responses. Aphids that are anholocyclic (permanently parthenogenetic) or are monoecious (non-host-alternating) were advancing their phenology faster than those that were not. Climate drives phenology and traits help explain how this takes place biologically. Phenology and trait ecology are critical to understanding the threat posed by emerging pests such as Myzus persicae nicotianae and Aphis fabae cirsiiacanthoidis, as revealed by the species accumulation analysis.


Subject(s)
Animal Migration , Aphids/physiology , Biodiversity , Animals , Climate , Seasons , United Kingdom
15.
J Anim Ecol ; 77(2): 265-74, 2008 Mar.
Article in English | MEDLINE | ID: mdl-18031524

ABSTRACT

1. Understanding the wide-scale processes controlling communities across multiple sites is a foremost challenge of modern ecology. Here, data from a nation-wide network of field sites are used to describe the metacommunity dynamics of arable carabid beetles. This is done by modelling how communities are structured at a local level, by changes in the environment of the sampled fields and, at a regional level, by fitting spatial parameters describing latitudinal and longitudinal gradients. 2. Local and regional processes demonstrated independent and significant capacities for structuring communities. Within the local environment, crop type was found to be the primary determinant of carabid community composition. The regional component included a strong response to a longitudinal gradient, with significant increases in diversity in an east-to-west direction. 3. Carabid metacommunities seem to be structured by a combination of species sorting dynamics, operating at two different, but equally important, spatial scales. At a local scale, species are sorted along a resource gradient determined by crop type. At a wider spatial scale species appear to be sorted along a longitudinal gradient. 4. Nation-wide trends in communities coincided with known gradients of increased homogeneity of habitat mosaics and agricultural intensification. However, more work is required to understand fully how communities are controlled by the interaction of crops with changes in landscape structure at different spatial scales. 5. We conclude that crop type is a powerful determinant of carabid biodiversity, but that it cannot be considered in isolation from other components of the landscape for optimal conservation policy.


Subject(s)
Biodiversity , Coleoptera/physiology , Conservation of Natural Resources , Crops, Agricultural/growth & development , Ecosystem , Animals , Coleoptera/growth & development , Environment , Female , Male , Population Dynamics , Spatial Behavior/physiology , Species Specificity , United Kingdom
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