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Titre du document / Document title

Differential influence of a monotypic and diverse native aquatic plant bed on a macroinvertebrate assemblage; an experimental implication of exotic plant induced habitat

Auteur(s) / Author(s)

THEEL Heather J. (1) ; DIBBLE Eric D. (1) ; MADSEN John D. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Wildlife and Fisheries, Mississippi State University, 100 Thompson Hall, Stone Blvd, Mississippi State, MS 39762, ETATS-UNIS
(2) GeoResources Institute, Mississippi State University, Mississippi State, ETATS-UNIS

Résumé / Abstract

Aquatic plants mediate ecological processes in aquatic habitats, specifically predator-prey (bluegill sunfish (Lepomis macrochirus Rafinesque)-macroinvertebrate) interactions. Macroinvertebrate colonization is directly and indirectly influenced by substrate heterogeneity, interstitial space, and surface complexity. Exotic invasive plant species, such as Hydrilla verticillata L.F. Royle, may alter the available structure in aquatic habitat by creating a shift to a homogeneous habitat, thus affecting the macroinvertebrate community. Since macroinvertebrates provide a food base for young phytophilic fishes, changes in their density and abundance may alter food webs. We investigated the hypothesis that macroinvertebrate community structure is influenced by differences in habitat heterogeneity by measuring difference between a heterogeneous native aquatic plant bed, homogenous hydrilla plant bed, and habitat with no plants. Studies were conducted in the field (pond) and the experimental treatments were: (1) no plants, (2) monotypic bed of hydrilla, and (3) diverse native plants. Aquatic plants, regardless of species, supported greater macroinvertebrate abundance, richness, and biomass. Macroinvertebrate abundance, richness, and biomass in a hydrilla-dominated habitat did not differ significantly from a diverse plant habitat, except for richness in October. Indicator taxa did differ significantly between respective treatments, suggesting a change in species composition. However, no significant effect of fish predation on macroinvertebrate populations and/or community structure was documented. The data suggest that a shift from a natural mosaic of vegetated habitat to a highly complex monotypic habitat (e.g., exotic hydrilla) may reduce spatial heterogeneity important to structuring a macroinvertebrate assemblage.

Revue / Journal Title

Hydrobiologia    ISSN  0018-8158   CODEN HYDRB8 

Source / Source

2008, vol. 600, pp. 77-87 [11 page(s) (article)] (1 p.3/4)

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1948) (Revue)

Mots-clés anglais / English Keywords

Spermatophyta

;

Angiospermae

;

Monocotyledones

;

Hydrocharitaceae

;

Invertebrata

;

Aquatic environment

;

Hydrobiology

;

Interaction

;

Heterogeneity

;

Habitat

;

Plant introduction

;

Experimental study

;

Community

;

Aquatic plant

;

Native species

;

Mots-clés français / French Keywords

Spermatophyta

;

Angiospermae

;

Monocotyledones

;

Hydrocharitaceae

;

Hydrilla verticillata

;

Invertebrata

;

Milieu aquatique

;

Hydrobiologie

;

Interaction

;

Hétérogénéité

;

Habitat

;

Introduction végétal

;

Etude expérimentale

;

Communauté

;

Plante aquatique

;

Espèce indigène

;

Mots-clés espagnols / Spanish Keywords

Spermatophyta

;

Angiospermae

;

Monocotyledones

;

Hydrocharitaceae

;

Invertebrata

;

Medio acuático

;

Hidrobiología

;

Interacción

;

Heterogeneidad

;

Habitat

;

Introducción vegetal

;

Estudio experimental

;

Comunidad

;

Planta acuática

;

Especie indigena

;

Mots-clés d'auteur / Author Keywords

Habitat complexity

;

Heterogeneity

;

Hydrilla verticillata

;

Macroinvertebrate-plant interaction

;

Localisation / Location

INIST-CNRS, Cote INIST : 5329, 35400018369950.0070

Nº notice refdoc (ud4) : 20189959



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