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Towards evidence‐based conservation of subterranean ecosystems

Mammola, Stefano; Meierhofer, Melissa B.; Borges, Paulo A.V.; Colado, Raquel; Culver, David C.; Deharveng, Louis; Delić, Teo; Di Lorenzo, Tiziana; Dražina, Tvrtko; Ferreira, Rodrigo L.; Fiasca, Barbara; Fišer, Cene; Galassi, Diana M. P.; Garzoli, Laura; Gerovasileiou, Vasilis; Griebler, Christian; Halse, Stuart; Howarth, Francis G.; Isaia, Marco; Johnson, Joseph S.; Komerički, Ana; Martínez, Alejandro; Milano, Filippo; Moldovan, Oana T.; Nanni, Veronica; Nicolosi, Giuseppe; Niemiller, Matthew L.; Pallarés, Susana; Pavlek, Martina; Piano, Elena; Pipan, Tanja; Sanchez‐Fernandez, David; Santangeli, Andrea; Schmidt, Susanne I.; Wynne, J. Judson; Zagmajster, Maja; Zakšek, Valerija; Cardoso, Pedro (2022) Towards evidence‐based conservation of subterranean ecosystems. Biological reviews, 97 (4). pp. 1476-1510. ISSN 1464-7931

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Abstract

Subterranean ecosystems are among the most widespread environments on Earth, yet we still have poor knowledge of their biodiversity. To raise awareness of subterranean ecosystems, the essential services they provide, and their unique conservation challenges, 2021 and 2022 were designated International Years of Caves and Karst. As these ecosystems have traditionally been overlooked in global conservation agendas and multilateral agreements, a quantitative assess- ment of solution-based approaches to safeguard subterranean biota and associated habitats is timely. This assessment allows researchers and practitioners to understand the progress made and research needs in subterranean ecology and management. We conducted a systematic review of peer-reviewed and grey literature focused on subterranean ecosys- tems globally (terrestrial, freshwater, and saltwater systems), to quantify the available evidence-base for the effectiveness ofconservation interventions. We selected 708 publications from the years 1964 to 2021 that discussed, recommended, or implemented 1, 954 conservation interventions in subterranean ecosystems. We noted a steep increase in the number of studies from the 2000s while, surprisingly, the proportion of studies quantifying the impact of conservation interven- tions has steadily and significantly decreased in recent years. The effectiveness of31% ofconservation interventions has been tested statistically. We further highlight that 64% ofthe reported research occurred in the Palearctic and Nearctic biogeographic regions. Assessments of the effectiveness of conservation interventions were heavily biased towards indi- rect measures (monitoring and risk assessment), a limited sample of organisms (mostly arthropods and bats), and more accessible systems (terrestrial caves). Our results indicate that most conservation science in the field ofsubterranean biol- ogy does not apply a rigorous quantitative approach, resulting in sparse evidence for the effectiveness of interventions. This raises the important question of how to make conservation efforts more feasible to implement, cost-effective, and long-lasting. Although there is no single remedy, we propose a suite of potential solutions to focus our efforts better towards increasing statistical testing and stress the importance of standardising study reporting to facilitate meta- analytical exercises. We also provide a database summarising the available literature, which will help to build quantita- tive knowledge about interventions likely to yield the greatest impacts depending upon the subterranean species and hab- itats of interest. We view this as a starting point to shift away from the widespread tendency of recommending conservation interventions based on anecdotal and expert-based information rather than scientific evidence, without quantitatively testing their effectiveness.

Item Type: Article
Uncontrolled Keywords: biospeleology ; cave ; climate change ; conservation biology, ecosystem management, extinction risk, ground- water ; legislation ; pollution ; subterranean biology
Subjects: NATURAL SCIENCES > Biology
Divisions: Division of Molecular Biology
Depositing User: Martina Pavlek
Date Deposited: 14 Jul 2022 13:09
URI: http://fulir.irb.hr/id/eprint/7479
DOI: 10.1111/brv.12851

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