干旱区生态环境知识资源中心(Arid): Communities at the extreme: Aquatic food webs in desert landscapes

Arid

DOI	10.1002/ece3.5648
	Communities at the extreme: Aquatic food webs in desert landscapes
	Moran, Nicholas P.1,2; Wong, Bob B. M.1; Thompson, Ross M.3
通讯作者	Moran, Nicholas P.
来源期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
出版年	2019
卷号	9 期号:19 页码:11464-11475
英文摘要	Studying food webs across contrasting abiotic conditions is an important tool in understanding how environmental variability impacts community structure and ecosystem dynamics. The study of extreme environments provides insight into community-wide level responses to environmental pressures with relevance to the future management of aquatic ecosystems. In the western Lake Eyre Basin of arid Australia, there are two characteristic and contrasting aquatic habitats: springs and rivers. Permanent isolated Great Artesian Basin springs represent hydrologically persistent environments in an arid desert landscape. In contrast, hydrologically variable river waterholes are ephemeral in space and time. We comprehensively sampled aquatic assemblages in contrasting ecosystem types to assess patterns in community composition and to quantify food web attributes with stable isotopes. Springs and rivers were found to have markedly different invertebrate communities, with rivers dominated by more dispersive species and springs associated with species that show high local endemism. Qualitative assessment of basal resources shows autochthonous carbon appears to be a key basal resource in both types of habitat, although the particular sources differed between habitats. Food-web variables such as trophic length, trophic breadth, and community isotopic niche size were relatively similar in the two habitat types. The basis for the similarity in food-web structure despite differences in community composition appears to be broader isotopic niches for predatory invertebrates and fish in springs as compared with rivers. In contrast to published theory, our findings suggest that the food webs of the hydrologically variable river sites may show less dietary generalization and more compact food-web modules than in springs.
英文关键词	community food webs ground water stable isotopes temporary pools
类型	Article
语种	英语
国家	Australia ; Germany
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000485554600001
WOS关键词	GREAT-ARTESIAN BASIN ; ARID-ZONE ; CHAIN LENGTH ; TEMPORAL VARIABILITY ; TROPHIC POSITION ; SOUTH-AUSTRALIA ; ECOSYSTEM SIZE ; ORGANIC-CARBON ; CLIMATE-CHANGE ; NICHE BREADTH
WOS类目	Ecology ; Evolutionary Biology
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215283
作者单位	1.Monash Univ, Sch Biol Sci, Clayton, Vic, Australia; 2.Bielefeld Univ, Evolutionary Biol, Morgenbreede 45, D-33615 Bielefeld, Germany; 3.Univ Canberra, Inst Appl Ecol, Canberra, ACT, Australia
推荐引用方式 GB/T 7714	Moran, Nicholas P.,Wong, Bob B. M.,Thompson, Ross M.. Communities at the extreme: Aquatic food webs in desert landscapes[J],2019,9(19):11464-11475.
APA	Moran, Nicholas P.,Wong, Bob B. M.,&Thompson, Ross M..(2019).Communities at the extreme: Aquatic food webs in desert landscapes.ECOLOGY AND EVOLUTION,9(19),11464-11475.
MLA	Moran, Nicholas P.,et al."Communities at the extreme: Aquatic food webs in desert landscapes".ECOLOGY AND EVOLUTION 9.19(2019):11464-11475.