NDLI: Invasive macrophyte effects on littoral trophic structure and carbon sources

Content Provider	Springer Nature Link
Author	Kovalenko, Katya E. Dibble, Eric D.
Copyright Year	2013
Abstract	Limited data from terrestrial ecosystems suggest that invasive species can affect energy flow and nutrient cycling in invaded systems. This is likely also true for aquatic ecosystems, yet little information is available on food web effects of invasive macrophytes. This study examined the effects of dominant invasive Eurasian watermilfoil on lake trophic structure and energy flow. Stable isotopes of carbon and nitrogen were used to compare trophic structure in invaded and uninvaded lakes and macrophyte stands. Contribution of native and invasive macrophytes, their epiphyton and detritus to the upper trophic level of lacustrine food webs was partitioned using mixing models. Carbon isotope values of macroinvertebrate consumers were similar to macrophyte-associated production in stands from which they were collected. However, contribution of Eurasian watermilfoil and its epiphyton to higher trophic level was negligible, and littoral fish derived most of their energy from sources associated with native macrophytes, despite their lower abundance. This means that littoral fish may depend on the remaining patches of native macrophytes in lakes invaded by non-native plants. Considering previous findings, these results show that the assessment of ecosystem-level processes is needed to understand the entire range of impacts of invasive species.
Starting Page	23
Ending Page	34
Page Count	12
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	721
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-08-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Macrophyte Food web Non-native species Stable isotopes Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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