Editors
Matt Hill
Document Type
Article
Publication Date
3-23-2020
Publication Title
NeoBiota
Volume
55
First page number:
1
Last page number:
9
Abstract
We assessed how assemblages of spiders were structured in small Hawaiian tropical forest fragments (Hawaiian, kipuka) within a matrix of previous lava flows, over both space (sampling kipuka of different sizes) and time (comparison with a similar study from 1998). Standardized hand-collection by night was carried out in May 2016. In total, 702 spiders were collected, representing 6 families and 25 (morpho-)species. We found that the number of individuals, but not species richness, was highly correlated with the area of sampled forest fragments, suggesting that kipuka act as separate habitat islands for these predatory arthropods. Species richness was significantly lower in the lava matrix outside the kipuka compared to the kipuka habitats, although there was no statistical difference in species composition between the two habitats, largely because of similarity of non-native species in both habitats. Over the last 20 years, the abundance of non-native spider species substantially increased in both kipuka and lava habitats, in marked contrast to the vegetation that has remained more intact. With endemicity of terrestrial arthropods reaching over 95% in native forests, non-native predatory species present a critical challenge to the endemic fauna.
Keywords
Araneae, Diachronic study, Island
Disciplines
Entomology | Forest Sciences
File Format
File Size
445 KB
Language
English
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Repository Citation
Pétillon, J.,
Privet, K.,
Roderick, G. K.,
Gullespie, R. G.,
Price, D. K.
(2020).
Non-Native Spiders Change Assemblages of Hawaiian Forest Fragment Kipuka Over Space and Time. In Matt Hill,
NeoBiota, 55
1-9.
http://dx.doi.org/10.3897/neobiota.55.48498