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An expert-based assessment of global threats and conservation measures for spiders

V. Branco,P. Cardoso

Published 2020 in Global Ecology and Conservation

ABSTRACT

Abstract Despite the prominent role of spiders in most ecosystems, these invertebrates are still notably endangered as well as underrepresented in current conservation efforts. We sent a survey to spider experts and enthusiasts belonging to arachnological societies across the globe to determine the general consensus on globally relevant threats to spiders as well as the most relevant conservation measures. We report that respondents found agriculture, livestock farming & forestry, climate change, urbanisation and pollution (including pesticides) to be the most relevant threats to spider species worldwide. Likewise, land protection and education & awareness were considered the most relevant conservation measures to avoid species declines and extinctions. Although these results tend to be consistent across the biogeographic regions of expertise of respondents, there was significant variation between regions. We discuss the support and justification for the patterns found, their regional variations, and the relevance of threats and conservation measures. This is the first global roadmap for spider species conservation action and research. In general, land should be set aside for species protection, agroforestry practices should be carefully considered, climate change should be mitigated, and the general public should be made more aware of spiders, their importance and the threats they face.

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