气候变化领域集成服务门户(CCPortal): Ground-dwelling spiders and understory vascular plants on Fuegian austral forests: Community responses to variable retention management and their association to natural ecosystems

CCPortal

DOI	10.1016/j.foreco.2020.118375
	Ground-dwelling spiders and understory vascular plants on Fuegian austral forests: Community responses to variable retention management and their association to natural ecosystems
	Argañaraz C.I.; Martínez Pastur G.J.; Ramírez M.J.; Grismado C.J.; Blazina A.P.; Lencinas M.V.
发表日期	2020
ISSN	0378-1127
卷号	474
英文摘要	Variable retention mitigates negative effects of traditional harvesting on biodiversity, maintaining legacies in harvested forests as habitat for sensitive species, and generating other habitats for early-seral species. Their assessment, including drivers, has a high concern for society. Likewise, species association with ecosystems in the landscape (as different forest types, grasslands and peatlands) are unknown for some taxa and regions, and could explain species flow into harvested areas. Therefore, we evaluated the forest harvest impact on ground-dwelling spiders and vascular plants, their diversity and association to vegetation types in the landscape matrix, and richness and abundance correlations with forest structure. Six natural common habitats were studied in Tierra del Fuego (Argentina), where variable retention has been implemented: aggregated (AR) and dispersed (DR) retention in harvested Nothofagus pumilio forests, unharvested primary forests (NPF) as reference, grasslands (G), peatlands (P), and unharvested N. antarctica forests (NAF). We surveyed spiders (N = 432, by 6 habitats × 6 replicates × 6 collections × 2 years), and vascular plants (N = 36, by 6 habitats × 6 replicates), and characterized forest structure in wooded ecosystems. We determined for both taxa richness, relative abundance (total captures/ground cover) and Shannon-Wiener and Pielou indices, compared assemblage composition and indicator species among harvesting treatments and vegetation types, and analyzed correlations. We sampled 752 individuals of spiders from 33 species (six families), and 79 vascular plant species (28 families) that averaged 52% total vegetation cover. Total spider captures and overall richness were higher in DR > NPF > AR, although differences were not detected at plot level for any variable. For understory vascular plants, richness and cover were the highest on DR, followed by AR and NPF, as well as at plot level, with no affectation in indices. Likewise, highest richness and abundance occurred in NAF and NPF for spiders, and in NAF and G for vascular plants, with unique assemblages in each vegetation type despite the shared species. Assemblages also differed in harvested areas, including species of other vegetation types mainly in DR, where new conditions were generated by reduction of forest structure variables (evidenced by negative correlations), while AR maintained species composition similar to NPF, contributing to the conservation of forest specialists. Indicators occurred for both taxa in several habitats. This study highlights the importance of different vegetation types for spider and plant conservation at landscape level, while provides tools for developing monitoring strategies and conservation policies. © 2020 Elsevier B.V.
关键词	Biodiversity Conservation Ecosystems Harvesting Housing Vegetation Wetlands Assemblage composition Conservation policy Monitoring strategy Negative correlation Relative abundance Species composition Variable retentions Vascular plant species Forestry assessment method biodiversity community response conservation planning ecosystem management environmental monitoring relative abundance species richness spider stand structure understory vascular plant vegetation type Biodiversity Conservation Ecosystems Harvesting Plants Wetlands Argentina Tierra del Fuego [(PRV) Argentina]Araneae Nothofagus Nothofagus antarctica Nothofagus pumilio Tracheophyta
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132626
推荐引用方式 GB/T 7714	Argañaraz C.I.,Martínez Pastur G.J.,Ramírez M.J.,et al. Ground-dwelling spiders and understory vascular plants on Fuegian austral forests: Community responses to variable retention management and their association to natural ecosystems[J]. Forest Ecology and Management,2020,474.
APA	Argañaraz C.I.,Martínez Pastur G.J.,Ramírez M.J.,Grismado C.J.,Blazina A.P.,&Lencinas M.V..(2020).Ground-dwelling spiders and understory vascular plants on Fuegian austral forests: Community responses to variable retention management and their association to natural ecosystems.,474.
MLA	Argañaraz C.I.,et al."Ground-dwelling spiders and understory vascular plants on Fuegian austral forests: Community responses to variable retention management and their association to natural ecosystems".474(2020).