Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14516 |
Sediment deposition from eroding peatlands alters headwater invertebrate biodiversity | |
Brown, Lee E.1; Aspray, Katie L.1; Ledger, Mark E.2; Mainstone, Chris3; Palmer, Sheila M.1; Wilkes, Martin4; Holden, Joseph1 | |
2019-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:2页码:602-619 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Land use and climate change are driving widespread modifications to the biodiverse and functionally unique headwaters of rivers. In temperate and boreal regions, many headwaters drain peatlands where land management and climate change can cause significant soil erosion and peat deposition in rivers. However, effects of peat deposition in river ecosystems remain poorly understood. We provide two lines of evidence-derived from sediment deposition gradients in experimental mesocosms (0-7.5 g/m(2)) and headwaters (0.82-9.67 g/m(2))-for the adverse impact of peat deposition on invertebrate community biodiversity. We found a consistent negative effect of sediment deposition across both the experiment and survey; at the community level, decreases in density (1956 to 56 individuals per m(2) in headwaters; mean 823 +/- 129 (SE) to 288 +/- 115 individuals per m(2) in mesocosms) and richness (mean 12 +/- 1 to 6 +/- 2 taxa in mesocosms) were observed. Sedimentation increased beta diversity amongst experimental replicates and headwaters, reflecting increasing stochasticity amongst tolerant groups in sedimented habitats. With increasing sedimentation, the density of the most common species, Leuctra inermis, declined from 290 +/- 60 to 70 +/- 30 individuals/m(2) on average in mesocosms and >800 individuals/m(2) to 0 in the field survey. Traits analysis of mesocosm assemblages suggested biodiversity loss was driven by decreasing abundance of invertebrates with trait combinations sensitive to sedimentation (longer life cycles, active aquatic dispersal of larvae, fixed aquatic eggs, shredding feeding habit). Functional diversity metrics reinforced the idea of more stochastic community assembly under higher sedimentation rates. While mesocosm assemblages showed some compositional differences to surveyed headwaters, ecological responses were consistent across these spatial scales. Our results suggest short-term, small-scale stressor experiments can inform understanding of "real-world" peatland river ecosystems. As climate change and land-use change are expected to enhance peatland erosion, significant alterations to invertebrate biodiversity can be expected where these eroded soils are deposited in rivers. |
英文关键词 | erosion functional diversity headwater macroinvertebrate peat river stream traits |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456028900018 |
WOS关键词 | BLANKET PEAT EROSION ; FINE SEDIMENT ; MACROINVERTEBRATE ASSEMBLAGES ; FUNCTIONAL DIVERSITY ; PERMAFROST THAW ; WATER-QUALITY ; STREAM ; RESPONSES ; DRAINAGE ; IMPACTS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16597 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Leeds, Sch Geog, Water Leeds, Leeds, W Yorkshire, England; 2.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England; 3.Nat England, Peterborough, Cambs, England; 4.Coventry Univ, Ctr Agroecol Water & Resilience, Coventry, W Midlands, England |
推荐引用方式 GB/T 7714 | Brown, Lee E.,Aspray, Katie L.,Ledger, Mark E.,et al. Sediment deposition from eroding peatlands alters headwater invertebrate biodiversity[J]. GLOBAL CHANGE BIOLOGY,2019,25(2):602-619. |
APA | Brown, Lee E..,Aspray, Katie L..,Ledger, Mark E..,Mainstone, Chris.,Palmer, Sheila M..,...&Holden, Joseph.(2019).Sediment deposition from eroding peatlands alters headwater invertebrate biodiversity.GLOBAL CHANGE BIOLOGY,25(2),602-619. |
MLA | Brown, Lee E.,et al."Sediment deposition from eroding peatlands alters headwater invertebrate biodiversity".GLOBAL CHANGE BIOLOGY 25.2(2019):602-619. |
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