Environmental filtering of native and non-native stream macrophyte assemblages by habitat disturbances in an agricultural landscape

Autor: Théophile L. Mouton, Sanjay Wadhwa, Fleur E. Matheson, Fabrice Stephenson, Paul D. Champion, Tenna Riis, Mark P. Hamer, Alicia K. Catlin
Přispěvatelé: MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Environmental Engineering
restoration
010504 meteorology & atmospheric sciences
Introduced species
trait responses
010501 environmental sciences
Biology
Functional diversity
01 natural sciences
[SDV.EE.ECO]Life Sciences [q-bio]/Ecology
environment/Ecosystems
Rivers
species traits
functional diversity measures
land-use
Environmental Chemistry
Animals
Non-native flora
Ecosystem
RLQ and fourth-corner analyses
Waste Management and Disposal
Restoration ecology
0105 earth and related environmental sciences
Trophic level
Riparian zone
geography
geography.geographical_feature_category
Ecology
Agriculture
Biodiversity
15. Life on land
Pollution
Invertebrates
Macrophyte
eutrophication
Habitat
classification
Indicator species
ecological impacts
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Introduced Species
Functional traits
management
Environmental Monitoring
New Zealand
Agricultural impacts
metaanalysis
Zdroj: Science of the Total Environment
Science of the Total Environment, Elsevier, 2019, 659, pp.1370--1381. ⟨10.1016/j.scitotenv.2018.12.277⟩
Mouton, T L, Matheson, F E, Stephenson, F, Champion, P D, Wadhwa, S, Hamer, M P, Catlin, A & Riis, T 2019, ' Environmental filtering of native and non-native stream macrophyte assemblages by habitat disturbances in an agricultural landscape ', Science of the Total Environment, vol. 659, pp. 1370-1381 . https://doi.org/10.1016/j.scitotenv.2018.12.277
ISSN: 0048-9697
1879-1026
Popis: Understanding how inter-specific variation in functional traits affects native and non-native species responses to stream disturbances, is necessary to inform management strategies, providing tools for biomonitoring, conservation and restoration. This study used a functional trait approach to characterise the responses of macrophyte assemblages to reach-scale disturbances (measured by lack of riparian shading, altered hydromorphology and eutrophication), from 97 wadeable stream sites in an agriculturally impacted region of New Zealand. To determine whether macrophyte assemblages differed due to disturbances, we examined multidimensional assemblage functional structure in relation to eleven functional traits and further related two functional diversity indices (entropy and originality) to disturbances. Macrophyte assemblages showed distinct patterns in response to disturbances, with riparian shading and hydromorphological conditions being the strongest variables shaping macrophyte functional structure. In the multidimensional space, most of the non-native species were associated with disturbed conditions. These species had traits allowing faster colonisation rates (higher number of reproductive organs and larger root-rhizome system) and superior competitive abilities for resources (tall and dense canopy, heterophylly and greater preferences for light and nitrogen). In addition, lack of riparian shading increased the abundance of functionally distinct species (i.e. entropy), and eutrophication resulted in the growth of functionally unique species (i.e. originality). We demonstrated that stream reach-scale habitat disturbances were associated to a dominance of more productive species, equating to a greater abundance of non-native species. This, can result in a displacement of native species, habitat alterations, and changes to higher trophic level assemblages. Our results suggests that reach-scale management efforts such as the conservation and restoration of riparian vegetation that provides substantial shading and hydromorphologically diverse in-stream habitat, would have beneficial direct and indirect effects on ecosystem functioning, and contribute to the mitigation of land-use impacts.
Databáze: OpenAIRE
Externí odkaz: