Habitat alteration facilitates the dominance of invasive species through disrupting niche partitioning in floodplain wetlands

Wang, Yuyu; Tan, Wanlong; Li, Bin; Wen, Lei; Lei, Guangchun

doi:10.1111/ddi.13376

Cited by 34 publications

(22 citation statements)

References 77 publications

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“…Over the past two decades, considerable attention has been focused on understanding the impact of invasive species on ecosystem functioning by analyzing the changes in nutritional interactions among species [ 56 ]. Although many studies have used stable isotope analyses to explore substantial ecological disturbances of non-native species and trophic destruction has been documented for a variety of taxa during the last two decades [ 57 , 58 , 59 , 60 ], this study provided clear evidence that invasive Nile tilapia can alter the food chain and influence trophic structure of native species, ultimately destroying ecosystem stability. In addition, Nile tilapia also compete with local fish for habitat and ultimately displace native fish from their preferred habitats [ 61 ].…”

Section: Discussionmentioning

confidence: 91%

Nile Tilapia (Oreochromis niloticus Linnaeus, 1758) Invasion Caused Trophic Structure Disruptions of Fish Communities in the South China River—Pearl River

Shuai

2022

Biology

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Widespread introductions of non-native species, including aquaculture and ornamental species, threaten biodiversity and ecosystem functioning by modifying the trophic structure of communities. In this study, we quantified the multiple facets of trophic disruption in freshwater communities invaded by Nile tilapia, by comparing uninvaded and invaded rivers downstream of the Pearl River, China. Nile tilapia invasion reduced the trophic status of native fish species by forcing native herbivores and planktivores to seek new food sources. The food chain was also shortened by decreasing the trophic levels of native invertivores, omnivores, and piscivores, while the total isotopic niche area (TA) of native invertivores, omnivores, piscivores, and planktivores species also decreased. Simultaneously, Nile tilapia invasion affected the isotopic diversity of the fish community. Decreasing isotopic richness (IRic), isotopic evenness (IEve), and increasing isotopic uniqueness (IUni) indicated that Nile tilapia had a high trophic niche overlap with native species and competed with native species for food resources, and even caused the compression of the trophic niche of native species. Understanding the process described in this study is essential to conserve the stability of freshwater ecosystems, and improve the control strategy of alien aquatic organisms in south China.

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Section: Discussionmentioning

confidence: 91%

Nile Tilapia (Oreochromis niloticus Linnaeus, 1758) Invasion Caused Trophic Structure Disruptions of Fish Communities in the South China River—Pearl River

Shuai

2022

Biology

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“…However, when food diversity is low, there may be greater competition with native sh as both natives and invasives are forced to share resources (Bergstrom and Mensinger 2009;Córdova-Tapia et al 2015). Understanding how native sh food webs are shaped by their environment, as well as identifying species that have overlapping niches with invasives, is important for informing management strategies that aim to mitigate impacts of invasive species (Wang et al 2021). Stomach contents and stable isotope analyses are effective methods to study diet and trophic interactions (Pacioglu et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Diet-habitat ecology of invasive tilapia and native fish in a tropical river catchment following a tilapia invasion

O’Mara

Venarsky²,

Marshall

et al. 2023

Preprint

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Many species of tilapia (a collection of fish species from the cichlidae family) have biological traits that make them successful invaders. While widespread herbivory has been observed in many tilapia species, knowledge on habitat preferences and tilapia interactions with native fish food webs is limited. This study used stomach contents and stable isotope analysis of spotted tilapia (Pelmatolapia mariae) and Mozambique tilapia (Oreochromis mossambicus), and stable isotopes of common native fish species to explore relationships between habitat and diet for fish food webs in the Mitchell River, northern Australia, three years after tilapia were detected in the catchment. While plant material was the most abundant item in tilapia stomachs, some also contained other items in small quantities, such as fish eggs, small shrimp, and bivalves. Macrohabitat type (in-channel (no tilapia), off-channel (no tilapia), weir (tilapia present)) was related to native fish food web structure, with weir food webs showing similarities to off-channel food webs. In-channel food webs were more constrained than weir or off-channel food webs, reflecting a more limited range of available food sources. Off-channel habitats including creeks and wetlands were most similar to weir habitats and may therefore be most at risk of colonization as tilapia spread throughout the catchment. This study clearly demonstrated that the successful rapid invasion of these two tilapia species is linked to suitable habitat with abundant food that fuels growth and reproduction. These findings increase understanding of diet related habitat use during new tilapia invasions and trophic interactions with native species.

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“…Human land‐use changes the ecological interactions between species, which in invaded ecosystems is often at the cost of native biodiversity (e.g. Norbury et al., 2013; Wang et al., 2021). Changes in interaction strengths alter evolutionary selection pressures on both native and invasive animals, creating eco‐evolutionary feedbacks that are reflected in food web structure (David et al., 2017; Layman et al., 2007; Wainright et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Human land‐use changes the diets of sympatric native and invasive mammal species

Chiu‐Werner,

Jones

2023

Ecology and Evolution

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The consequences of biological invasions and habitat degradation for native biodiversity depend on how species cope with the individual and synergetic challenges these processes present. To assess the impact of anthropogenic land‐use on the food web architecture of an invaded community, we examine the diets of nine native and two highly invasive mammal species at different trophic levels, inhabiting different land‐uses across six biogeographic regions in Tasmania, Australia. We use two complementary methods, environmental DNA metabarcoding analysis (eDNA) of faeces and stable isotope analysis (SIA) of nitrogen (N) and carbon (C) in whole blood, to account for the high interindividual and temporal variability in the diets of multiple species simultaneously. eDNA showed regionalisation in the diet of smaller species, with land‐use further defining dietary taxa within each region. SIA revealed that bioregion and land‐use influence the δ13C values of all carnivore species and omnivores, whereas the δ15N values of these species are influenced only by land‐use and not bioregion. Including multiple species showed that native rats are changing their diet in response to the presence of invasive rats, an impact that would have otherwise been attributed to land‐use. Our findings demonstrate that human activities and invasive species are moulding the diets of invaded communities, raising questions about the potential impacts that dietary modifications will have on the life‐history traits and the evolutionary consequences these modifications might have on the survival of native species. This highlights the urgency of including human activities in ecological studies and the importance of targeting multispecies assemblages to gain a better understanding of synergetic impacts on native biodiversity.

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Habitat alteration facilitates the dominance of invasive species through disrupting niche partitioning in floodplain wetlands

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 34 publications

References 77 publications

Nile Tilapia (Oreochromis niloticus Linnaeus, 1758) Invasion Caused Trophic Structure Disruptions of Fish Communities in the South China River—Pearl River

Nile Tilapia (Oreochromis niloticus Linnaeus, 1758) Invasion Caused Trophic Structure Disruptions of Fish Communities in the South China River—Pearl River

Diet-habitat ecology of invasive tilapia and native fish in a tropical river catchment following a tilapia invasion

Human land‐use changes the diets of sympatric native and invasive mammal species

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