Abundance trends for river macroinvertebrates vary across taxa, trophic group and river typology.
Abundance trends for river macroinvertebrates vary across taxa, trophic group and river typology.
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DOI：
10.1111/gcb.16549
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发表时间：
2023-03
影响因子：
11.6
通讯作者：
Roy DB
中科院分区：
文献类型：
--
作者：
Powell KE;Oliver TH;Johns T;González-Suárez M;England J;Roy DB
越来越多的证据表明，在世界许多地区，陆生节肢动物的数量正在迅速减少。淡水无脊椎动物作为生态系统服务的主要提供者，其数量是否也在减少尚不清楚。我们通过分析2002年至2019年在英国河流5009个采样点收集的大型无脊椎动物丰度的长期数据集来解决这个问题。模式在不同的分类类群之间有明显的差异。在营养类群中，我们发现食肉动物的丰度增加了19%，食草动物增加了14.8%，而我们估计自2002年以来，分解者的丰度下降了21.7%。我们还发现，基于地质优势和集水区海拔，属于不同类型的河流的趋势存在异质性，有机低地河流在分类群和营养群中的丰度增长率普遍较高，而硅质低地河流的丰度下降幅度最大。我们的研究结果揭示了淡水大型无脊椎动物丰度在分类群、营养水平和河流类型之间变化的复杂图景。我们的分析有助于确定在我们发现大型无脊椎动物丰度下降的潜在环境压力源上采取行动的优先区域。我们通过分析英国河流中大型无脊椎动物的长期数据集，解决了淡水无脊椎动物（生态系统服务的关键提供者）数量是否正在减少的问题。我们发现在不同的分类群体、营养水平和河流类型之间丰度变化的复杂图景。在营养类群中，我们发现食肉动物的丰度增加了19%，食草动物的丰度增加了14%，而估计的分解者自2002年以来减少了21.7%。不同类型河流的趋势是不均匀的，有机低地河流在不同的分类群和营养群中丰度的增长率通常更高，而硅质低地河流的下降幅度最大。
There is mounting evidence that terrestrial arthropods are declining rapidly in many areas of the world. It is unclear whether freshwater invertebrates, which are key providers of ecosystem services, are also declining. We addressed this question by analysing a long‐term dataset of macroinvertebrate abundance collected from 2002 to 2019 across 5009 sampling sites in English rivers. Patterns varied markedly across taxonomic groups. Within trophic groups we detected increases in the abundance of carnivores by 19% and herbivores by 14.8%, while we estimated decomposers have declined by 21.7% in abundance since 2002. We also found heterogeneity in trends across rivers belonging to different typologies based on geological dominance and catchment altitude, with organic lowland rivers having generally higher rates of increase in abundance across taxa and trophic groups, with siliceous lowland rivers having the most declines. Our results reveal a complex picture of change in freshwater macroinvertebrate abundance between taxonomic groups, trophic levels and river typologies. Our analysis helps with identifying priority regions for action on potential environmental stressors where we discover macroinvertebrate abundance declines. We addressed the question of whether freshwater invertebrates, which are key providers of ecosystem services, are declining in abundance by analysing a long‐term dataset of macroinvertebrates in English rivers. We found a complex picture of change in abundance between taxonomic groups, trophic levels and river typologies. Within trophic groups we detected 19% increases in carnivore abundance, and 14% for herbivores, while estimating decomposers declined by 21.7% since 2002. Trends are heterogeneous across rivers of different typologies, organic lowland rivers having generally higher rates of increase in abundance across taxa and trophic groups, and siliceous lowland rivers having the most declines.
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影响因子：
12.8
作者：
FURSE, MT;WRIGHT, JF;MOSS, D
通讯作者：
MOSS, D
影响因子：
2.6
作者：
Greenwell, Matthew P.;Brereton, Tom;Oliver, Tom H.
通讯作者：
Oliver, Tom H.
影响因子：
6.3
作者：
Baranov, Viktor;Jourdan, Jonas;Haase, Peter
通讯作者：
Haase, Peter
影响因子：
11.6
作者：
Fried-Petersen, Hannah B.;Araya-Ajoy, Yimen G.;Angeler, David G.
通讯作者：
Angeler, David G.
影响因子：
3.5
作者：
Hallmann, Caspar A.;Zeegers, Theo;Jongejans, Eelke
通讯作者：
Jongejans, Eelke