Ecology in the age of climate change: Challenges facing the effective implementation of nature-based solutions in terrestrial ecosystems

ABSTRACT

At this stage of the Great Acceleration of the Anthropocene, humanity is experiencing the global issues of worsening climate change impacts, devastating damage from more frequent and severe natural disasters and the COVID-19 pandemic, all of which are attributable to ecosystem degradation and biodiversity loss. The global community recognises that these issues pose severe societal and economic risks. “Nature-based solutions” have been posited as a means to address these threats. Nature-based solutions utilise natural terrestrial ecosystem functions to provide environmental, social and economic benefits at low cost. The growing social demand for nature-based solutions constitutes an opportunity for the field of ecology to expand beyond the conventional focus on biodiversity and conservation and shift to presenting biodiversity and ecosystem functions as the basis of human well-being and social sustainability. We sought to identify a trajectory for ecological research that is aimed at contributing to the effective implementation of nature-based solutions. First, we summarise current social needs related to terrestrial ecosystem utilisation. Next, we provide an overview of existing literature and knowledge regarding biodiversity and terrestrial ecosystem function, which are critical to nature-based solutions. Finally, we identify outstanding ecological hurdles to the implementation of these strategies and propose a way forward based on our findings. We explain that any basic presentation of ecological processes requires addressing the impacts of climate change and the interrelatedness of biodiversity, climate and social systems. Enhanced ecological process models are critical for linking biodiversity and ecosystems with climate and social systems. It is crucial to establish a framework that embeds monitoring systems, data infrastructure and delivery systems within society to mobilise terrestrial ecosystem and biodiversity data and results. Furthermore, the implementation of nature-based solutions must include acknowledging trade-offs in objectives and transdisciplinary research with other fields and stakeholders with the shared goal of transformative change. Ecological research must demonstrate more clearly how terrestrial biodiversity and ecosystems are linked to human health and well-being, as well as how they are affected by production and consumption systems. In the age of climate change, the knowledge and tools of the ecologist form the foundation of nature-based solutions and provide an indispensable theoretical basis for this approach.AlternateæŠ„éŒ²äººæ–°ä¸–ã®å¤§åŠ é€Ÿã¨ã‚‚å‘¼ã°ã‚Œã‚‹æ°—å€™å¤‰å‹•ã®æ™‚ä»£ã«ãŠã„ã¦ã€æ°—å€™å¤‰å‹•å½±éŸ¿ã®é¡•åœ¨åŒ–ã€è‡ªç„¶ç½å®³ã®æ¿€ç”šåŒ–ãƒ»é »ç™ºåŒ–ã€COVID-19の世界的流行などの地球規模の問題が増大している。国際社会では、ã"ã‚Œã‚‰ã®å•é¡Œã¯ç”Ÿæ…‹ç³»ã®åŠ£åŒ–ã‚„ç”Ÿç‰©å¤šæ§˜æ€§ã®æå¤±ãŒè¦å› ã§ã‚ã‚‹ã"と、そして社会経済にも多大な損害ã‚'与える大きなリスクであるã"とが共通の認識となりつつある。そのような状況ã‚'åæ˜ ã—ã€é™¸åŸŸç”Ÿæ…‹ç³»ã®å¤šé¢çš„ãªæ©Ÿèƒ½ã‚'活用するã"とで、低いコストでç'°å¢ƒãƒ»ç¤¾ä¼šãƒ»çµŒæ¸ˆã«ä¾¿ç›Šã‚'もたらし、社会が抱える複数の課題の解決に貢献する「自然ã‚'基盤とした解決策」という新しい概念に大きな期待が寄せられている。ã"の解決策への社会的なニーズの高まりは、生態学が長年取り組ã‚"できた生物多様性や生態系の保全に関する課題ã‚'超えて、生態学が生物多様性や生態系が豊かな人é–"社会ã‚'継続し発展させる知的基盤となるã"とや、生態学の社会的有用性ã‚'示す機会である。そã"で本稿では、気候変動時代における「自然ã‚'åŸºç›¤ã¨ã—ãŸè§£æ±ºç­–ã€ã®å®Ÿè·µã«å‘ã‘ãŸç”Ÿæ…‹å­¦ç ”ç©¶ã®æ–¹å‘ã¥ã‘ã‚'目的とし、陸域生態系の活用に対する社会的なニーズの現状ã‚'概観する。その上で、「自然ã‚'åŸºç›¤ã¨ã—ãŸè§£æ±ºç­–ã€ã®éµã¨ãªã‚‹é™¸åŸŸç”Ÿæ ‹ç³»ã®ç”Ÿç‰©å¤šæ§˜æ€§ã‚„ç”Ÿæ…‹ç³»æ©Ÿèƒ½ã«é–¢ã™ã‚‹çŸ¥è¦‹ã‚'整理して課題ã‚'抽出し、ã"れらã‚'è¸ã¾ãˆã¦ä»Šå¾Œã®ç”Ÿæ…‹å­¦ç ”ç©¶ã®æ–¹å‘æ€§ã‚'å…·ä½"的に示す。まず、現象の基礎的な理解という観点からは、生物多様性ã‚'含む陸域生態系と気候システムや社会システムとの相äº'関係性ã‚'含めた包括的な気候変動影響のメカニズムの解明と、予測・評価のためのプロセスモデルの高度化ã‚'進めるã"と、そして同時に、陸域生態系と生物多様性の変化ã‚'ç¤ºã™ãŸã‚ã®åŠ¹æžœçš„ãªãƒ¢ãƒ‹ã‚¿ãƒªãƒ³ã‚°ã¨æƒ…å ±åŸºç›¤ã®å¼·åŒ–ã‚'行い、データや分析結果ã‚'社会に還元するフレームワークã‚'構築するã"ã¨ãŒå„ªå…ˆäº‹é …ã§ã‚ã‚‹ã€‚ã‚ˆã‚Šå®Ÿè·µçš„ãªè¦³ç‚¹ã‹ã‚‰ã¯ã€ã€Œè‡ªç„¶ã‚'基盤とした解決策」の実装や社会変革などにおいて共通の目標ã‚'ã‚‚ã¤ä»–åˆ†é‡Žã¨ã®å­¦éš›ç ”ç©¶ã‚'積極的に行うã"とにより、実装における目的é–"のトレードオフã‚'示すã"と、健康・福祉の課題や生産・消費システムの中での陸域生態系や生物多様性への影響や役割ã‚'示すã"ã¨ãªã©ãŒå„ªå…ˆäº‹é …ã¨ãªã‚‹ã€‚æ°—å€™å¤‰å‹•ã«ä»£è¡¨ã•ã‚Œã‚‹ä¸ç¢ºå®Ÿæ€§ã®é«˜ã„ç'°å¢ƒä¸‹ã§ã€åŠ¹æžœçš„な「自然ã‚'åŸºç›¤ã¨ã—ãŸè§£æ±ºç­–ã€ã®å®Ÿæ–½ãŸã‚ã«ã¯ã€ãã®ç§‘å­¦çš„åŸºç›¤ã¨ãªã‚‹ç”Ÿæ…‹å­¦ã®çŸ¥è¦‹ã¨ãƒ„ãƒ¼ãƒ«ã¯ä¸å¯æ¬ ã§ã‚ã‚Šã€ã¾ãŸãã®å®Ÿè£…ã‚'通じた社会変革へのé"筋においても生態学の貢献が期待されている。