期刊
BIOTROPICA
卷 48, 期 3, 页码 301-310出版社
WILEY
DOI: 10.1111/btp.12308
关键词
ATP; fungi; leaf litter breakdown; litterfall; shredders; sporulation; vereda
类别
资金
- National Council of Scientific and Technological Development (CNPq/INPA) [480298/2008-4]
- National Council of Scientific and Technological Development (CT-Hidro/Climatic Changes/Water Resources/CNPq) [403949/2013-0]
- National Council of Scientific and Technological Development [151375/2014-3]
- Minas Gerais Research Foundation (FAPEMIG) [APQ-2051-5.03/07]
The high biodiversity of tropical forest streams depends on the strong input of organic matter, yet the leaf litter decomposition dynamics in these streams are not well understood. We assessed how seasonal litterfall affects leaf litter breakdown, density and biomass of aquatic invertebrates, and the microbial biomass and sporulation of aquatic hyphomycetes in a South American grassland 'vereda' landscape. Although litter production in the riparian area was low, leaf litter breakdown was high compared with other South American systems, with maximum values coinciding with the rainy season. Fungal biomass in decomposing leaves was high, but spore densities in water and sporulation rates were very low. Invertebrates were not abundant in litter bags, suggesting they play a minor role in leaf litter decomposition. Chironomids accounted for similar to 70 percent of all invertebrates; only 10 percent of non-Chironomidae invertebrates were shredders. Therefore, fungi appear to be the drivers of leaf litter decomposition. Our results show that despite low productivity and relatively fast litter decomposition, organic matter accumulated in the stream and riparian area. This pattern was attributed to the wet/dry cycles in which leaves falling in the flat riparian zone remain undecomposed (during the dry period) and are massively transported to the riverbed (rainy season).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据