Effects of invasive macrophyte on trophic diversity and position of secondary consumers

Kovalenko, Katya E.; Dibble, Eric D.

doi:10.1007/s10750-010-0570-7

Cited by 23 publications

(14 citation statements)

References 27 publications

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“…For example, aquatic invertebrates generally increase associated with water hyacinth invasion. The refuge effect of submerged macrophytes in lakes on enhancing zooplankton communities and the control of phytoplankton has been demonstrated to be positive [26]. In some cases, invasive, submerged macrophyte species have impacted zoobenthos positively but not the zooplankton [27].…”

Section: Implications Within Local Contextmentioning

confidence: 99%

Invasion of Water Hyacinth (<i>Eichhornia crassipes</i>) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Mengistu¹,

Unbushe²,

Abebe³

2017

OJE

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Macrophytes play critical ecological role in inland water bodies, especially in shallow systems. Water hyacinth (Eichhornia crassipes) is an invasive plant species introduced to Ethiopian water bodies around the mid 20 th century with recently exacerbated devastating ecological and economic consequences. Here we report the impact of the invasive plant species on macrophyte species assemblage and biodiversity in Lake Abaya, southwestern Ethiopia. We compared four sites in Lake Abaya, two hyacinth infested and two non-infested, each site consisting of 15 plots. Our results showed that water hyacinth affects the macrophyte community composition, abundance and diversity negatively. Even though some macrophyte species from the Poaceae and Cyperaceae families appear to coexist with the alien plant, the invasive species has reduced macrophyte abundance and diversity at the infested sites, and in some cases changed the community to nearly monotypic flora. Our data affirm that water hyacinth has the potential to alter macrophyte composition, abundance and diversity in the wider Ethiopian aquatic ecosystems. A broad & closer, systematic and comprehensive look at the short and long term consequences of its expanding invasion within the framework of specific local environmental, ecological and societal conditions is long-overdue.

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Section: Implications Within Local Contextmentioning

confidence: 99%

Invasion of Water Hyacinth (<i>Eichhornia crassipes</i>) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Mengistu¹,

Unbushe²,

Abebe³

2017

OJE

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“…Trophic dynamics may also be affected by invasive macrophytes; however, these effects are likely species specific (Kornijow et al, 2005;Kovalenko & Dibble, 2011). Kovalenko & Dibble (2011) found that invertivorous and piscivorous fish in lakes dominated by M. spicatum had twice the isotopic niche (or trophic diversity) of fish in lakes dominated by native vegetation, indicating that primary consumers were feeding on a greater variety of carbon sources in invaded communities.…”

Section: Effects Of Invasive Macrophytes On Trophic Dynamicsmentioning

confidence: 99%

Effects of invasive macrophytes on freshwater fish and macroinvertebrate communities: the role of invasive plant traits

2011

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Biological invasions of aquatic plants (i.e., macrophytes) are a worldwide phenomenon, and within the last 15 years researchers have started to focus on the influence of these species on aquatic communities and ecosystem dynamics. We reviewed current literature to identify how invasive macrophyte species impact fishes and macroinvertebrates, explore how these mechanisms deviate (or not) from the accepted model of plant-fish interactions, and assess how traits that enable macrophytes to invade are linked to effects on fish and macroinvertebrate communities. We found that in certain instances, invasive macrophytes increased habitat complexity, hypoxia, allelopathic chemicals, facilitation of other exotic species, and inferior food quality leading to a decrease in abundance of native fish and macroinvertebrate species. However, mechanisms underlying invasive macrophyte impacts on fish and macroinvertebrate communities (i.e., biomass production, photosynthesis, decomposition, and substrate stabilization) were not fundamentally different than those of native macrophytes. We identified three invasive traits largely responsible for negative effects on fish and macroinvertebrate communities: increased growth rate, allelopathic chemical production, and phenotypic plasticity allowing for greater adaptation to environmental conditions than native species. We suggest that information on invasive macrophytes (including invasive traits) along with environmental data could be used to create models to better predict impacts of macrophyte invasion. However, effects of invasive macrophytes on trophic dynamics are less well-known and more research is essential to define system level processes.

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“…Convex hull area provides an index of realized niche space; although it was initially de scribed as a community-wide metric of niche width , it has since been applied at the population level by using individuals as sampling units (e.g. Atkinson et al 2010, Zambrano et al 2010, Kovalenko & Dibble 2011. Bootstrapping (unrestricted random sampling with replacement; n = 50) was used to generate replicate distributions of TA to allow statistical comparisons of mean TA between habitats for each species (statistical power β = 0.70 to 0.99 at theoretical TA differences of 0.5 to 1.0 ‰ 2 ).…”

Section: Trophic Niche Characteristicsmentioning

confidence: 99%

Differences in juvenile trophic niche for two coastal fish species that use marine and estuarine nursery habitats

Woodland

Secor

2011

Mar. Ecol. Prog. Ser.

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In coastal regions, age-0 juveniles of many fish species are capable of recruiting to either marine or estuarine nursery habitats, yet the ecological consequences for cohorts that use marine versus estuarine nurseries is poorly understood. In the present study, stable isotope (δ 13 C, δ 15 N) and stomach contents data were used to compare trophic ecology associated with differential habitat use for age-0 bluefish Pomatomus saltatrix and bay anchovy Anchoa mitchilli from 2 habitats: Maryland's (USA) inner continental shelf (shelf) and lower Chesapeake Bay (estuary). Bluefish occupied equivalent trophic positions (approx. 4.0 to 4.2; δ 15 N-and diet-based estimates) as tertiary consumers in the shelf and estuary. In contrast, bay anchovy were secondary-tertiary consumers with trophic position estimates of 3.5 to 3.8 in the shelf and 3.5 in the estuary. A C:N ratio proxy for lipid content was higher in the shelf cohorts for both species, and weight-at-length was also higher for shelf bay anchovy than estuarine bay anchovy. Estuarine cohorts of both species occupied a larger isotopic niche (i.e. convex hull area), yet 2-source mixing model results indicated that estuarine cohorts derived > 80% of their biomass from pelagic food webs alone. Conversely, shelf cohorts more equitably integrated pelagic (bluefish: 45 ± 7% [SD], bay anchovy: 46 ± 12%) and benthic food webs. The present study indicates that the juvenile trophic niche of these species can vary significantly across habitats and provides initial evidence that cohorts recruiting to Maryland's shelf can realize more diverse (i.e. utilization of multiple food webs) or superior (i.e. increased condition -bay anchovy only) foraging conditions than cohorts recruiting to proximal estuaries.

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Effects of invasive macrophyte on trophic diversity and position of secondary consumers

Cited by 23 publications

References 27 publications

Invasion of Water Hyacinth (<i>Eichhornia crassipes</i>) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Invasion of Water Hyacinth (<i>Eichhornia crassipes</i>) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Effects of invasive macrophytes on freshwater fish and macroinvertebrate communities: the role of invasive plant traits

Differences in juvenile trophic niche for two coastal fish species that use marine and estuarine nursery habitats

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Effects of invasive macrophyte on trophic diversity and position of secondary consumers

Cited by 23 publications

References 27 publications

Invasion of Water Hyacinth (&lt;i&gt;Eichhornia crassipes&lt;/i&gt;) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Invasion of Water Hyacinth (&lt;i&gt;Eichhornia crassipes&lt;/i&gt;) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Effects of invasive macrophytes on freshwater fish and macroinvertebrate communities: the role of invasive plant traits

Differences in juvenile trophic niche for two coastal fish species that use marine and estuarine nursery habitats

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Invasion of Water Hyacinth (<i>Eichhornia crassipes</i>) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya

Invasion of Water Hyacinth (<i>Eichhornia crassipes</i>) Is Associated with Decline in Macrophyte Biodiversity in an Ethiopian Rift-Valley Lake—Abaya