干旱区生态环境知识资源中心(Arid): Does invasive river red gum (Eucalyptus camaldulensis) alter leaf litter decomposition dynamics in arid zone temporary rivers?

Arid

DOI	10.1080/20442041.2020.1802196
	Does invasive river red gum (Eucalyptus camaldulensis) alter leaf litter decomposition dynamics in arid zone temporary rivers?
	Wasserman, Ryan J.; Sanga, Sia; Buxton, Mmabaledi; Dalu, Tatenda; Cuthbert, Ross N.
通讯作者	Wasserman, RJ
来源期刊	INLAND WATERS
ISSN	2044-2041
EISSN	2044-205X
英文摘要	Riparian zones are important for the maintenance of aquatic ecosystem functional integrity, yet are considered to be particularly vulnerable to plant invasions. The role of terrestrial riparian plant invasions in compromising aquatic ecosystem processes is, however, still poorly understood. This issue is particularly relevant for temporary rivers, which are understudied compared to permanent river systems, despite their ubiquity and largescale contributions to biogeochemical processes. Here we experimentally assessed leaf litter breakdown dynamics in situ in a temporary river in arid southeastern Botswana, Southern Africa. We contrasted aquatic leaching and microbial and invertebrate litter breakdown contributions to the native leadwoodCombretum imberbeand invasive river red gumEucalyptus camaldulensisin the Lotsane River. Fine-mesh (detritivore exclusion) and coarse-mesh (detritivore inclusion) bags were separately filled with leaf litter from each species and deployed in the river during a hydroperiod (wet phase), with decomposition measured over a 6-week period.E. camaldulensisshed significantly more leachate than the nativeC. imberbe.Significantly more microbial and detritivore breakdown was, however, observed in native than in invasive leaf litter. Overall, invertebrates contributed little to biological leaf litter breakdown processes compared to microbial breakdown contributions. Although significantly higher in native leaves, low invertebrate numbers were found in leaf litter in the study. This study highlights the role of microbial contributions to detrital decay in temporary arid zone rivers, whereas invertebrate contributions were relatively minor. The study further contributes to our understanding of how invasive riparian plant species alter aquatic detrital pool dynamics in invaded temporary wetland ecosystems.
英文关键词	biological invasions cross-ecosystem connectivity detritivore decomposition leaf litter decomposition microbial decomposition riparian zones
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000577026500001
WOS关键词	AQUATIC INVERTEBRATES ; ORGANIC-MATTER ; CLIMATE-CHANGE ; FOOD WEBS ; BREAKDOWN ; WOODLAND ; COLONIZATION ; BIODIVERSITY ; VARIABILITY ; ECOSYSTEMS
WOS类目	Limnology ; Marine & Freshwater Biology
WOS研究方向	Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328334
作者单位	[Wasserman, Ryan J.; Sanga, Sia; Buxton, Mmabaledi] Botswana Int Univ Sci & Technol, Dept Biol Sci & Biotechnol, Palapye, Botswana; [Wasserman, Ryan J.] Rhodes Univ, Dept Zool & Entomol, ZA-6140 Makhanda, South Africa; [Dalu, Tatenda] Univ Venda, Dept Ecol & Resource Management, Aquat Syst Res Grp, Thohoyandou, South Africa; [Cuthbert, Ross N.] Helmholtz Zentrum Ozeanforsch Kiel, GEOMAR, Kiel, Germany
推荐引用方式 GB/T 7714	Wasserman, Ryan J.,Sanga, Sia,Buxton, Mmabaledi,et al. Does invasive river red gum (Eucalyptus camaldulensis) alter leaf litter decomposition dynamics in arid zone temporary rivers?[J].
APA	Wasserman, Ryan J.,Sanga, Sia,Buxton, Mmabaledi,Dalu, Tatenda,&Cuthbert, Ross N..
MLA	Wasserman, Ryan J.,et al."Does invasive river red gum (Eucalyptus camaldulensis) alter leaf litter decomposition dynamics in arid zone temporary rivers?".INLAND WATERS