Eutrophication decreases distance decay of similarity in diatom communities

Goldenberg-Vilar, Alejandra; Dam, Herman van; Loon, E. Emiel van; Vonk, J. Arie; Geest, Harm G. van der; Admiraal, Wim

doi:10.1111/fwb.12363

Cited by 53 publications

(33 citation statements)

References 53 publications

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“…In contrast, the Pogonia stream is surrounded by ~480 ha of undeveloped oak-hickory forest, and is subject to much lower human impact. This finding agrees with other studies indicating that ecosystems that are highly im pacted by human activity tend to display lower biodiversity compared to less impacted areas (Rodrigues et al 2013, Goldenberg Vilar et al 2014). Recent studies have indicated that this trend extends to microbes including bacteria and fungi (Kebli et al 2012, Rodrigues et al 2013, and one previous report suggested that viral richness is likewise impacted (Fancello et al 2013).…”

Section: Comparison Of Lake Matoaka Viral Metagenomessupporting

confidence: 93%

Metagenomic assessment of viral diversity in Lake Matoaka, a temperate, eutrophic freshwater lake in southeastern Virginia, USA

Green¹,

Rahman²,

Saxton³

et al. 2015

Aquat. Microb. Ecol.

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Little is known about the composition and diversity of temperate freshwater viral communities. This study presents a metagenomic analysis of viral community composition, taxonomic and functional diversity of temperate, eutrophic Lake Matoaka in southeastern Virginia (USA). Three sampling sites were chosen to represent differences in anthropogenic impacts: the Crim Dell Creek mouth (impacted), the Pogonia Creek mouth (less impacted) and the main body of the lake (mixed). Sequences belonging to tailed bacteriophages were the most abundant at all 3 sites, with Podoviridae predominating. The main lake body harbored the highest virus genotype richness and included cyanophage and eukaryotic algal virus sequences not found at the other 2 sites, while the impacted Crim Dell Creek mouth showed the lowest richness. Cross-contig comparisons indicated that similar virus genotypes were found at all 3 sites, but at different rankabundances. Hierarchical cluster analysis of multiple viral metagenomes indicated high genetic similarity between viral communities of related environments, with freshwater, marine, hypersaline, and eukaryote-associated environments forming into clear groups despite large geographic distances between sampling locations within each environment type. These results support the conclusion that freshwater viral communities are genetically distinct from virus assemblages in other environments.KEY WORDS: Virus · Freshwater · Lake · Temperate · Metagenome · Sequencing · Virome Resale or republication not permitted without written consent of the publisher

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Section: Comparison Of Lake Matoaka Viral Metagenomessupporting

confidence: 93%

Metagenomic assessment of viral diversity in Lake Matoaka, a temperate, eutrophic freshwater lake in southeastern Virginia, USA

Green¹,

Rahman²,

Saxton³

et al. 2015

Aquat. Microb. Ecol.

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“…Land use proved an important spatial factor explaining the variance in community composition, suggesting that agricultural practices can affect spatial β-diversity as grassland and bulb ditches had lower median β-diversity than the dune ditches. This concurs with other studies showing that spatial β-diversity can decrease with increasing disturbance in a wide array of organisms (Goldenberg Vilar et al, 2014;Johnson & Angeler, 2014;Karp et al, 2012).…”

Section: Discussionsupporting

confidence: 93%

“…This concurs with other studies showing that spatial β-diversity can decrease with increasing disturbance in a wide array of organisms (Goldenberg Vilar et al, 2014;Johnson & Angeler, 2014;Karp et al, 2012). This concurs with other studies showing that spatial β-diversity can decrease with increasing disturbance in a wide array of organisms (Goldenberg Vilar et al, 2014;Johnson & Angeler, 2014;Karp et al, 2012).…”

Section: Discussionsupporting

confidence: 92%

Spatial and temporal homogenisation of freshwater macrofaunal communities in ditches

et al. 2019

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There is a widespread concern that we are witnessing an ongoing homogenisation of ecological communities. However, in contrast to human impacts on spatial patterns in biodiversity, human impacts on the temporal aspects of β‐diversity have received little attention. Moreover, the interplay between spatial and temporal β‐diversity is poorly understood. To address this knowledge gap, we assessed dissimilarity within freshwater macrofaunal communities of drainage ditches to determine spatiotemporal β‐diversity as well as homogenisation in relation to different types of land use. We considered four distinct changes in community composition: spatial turnover, temporal turnover, spatial variation over time, and temporal variation in space, as well as the combined effects of space and time on β‐diversity. As a metric of dissimilarity, we calculated the taxonomic Hellinger distance between samples from different locations and time points and correlated these with distance in space and in time, as well as with three spatial variables, including land‐use type, and two temporal variables. We studied the effect of interactions between spatial and temporal variables on dissimilarity by applying a permutational analysis of variance. Our results illustrate the importance of changes in community composition in time with respect to temporal turnover, spatial variation over time, and temporal variation in space. While we did not find spatial turnover in community composition, both month and year had a considerable effect. Within a year, β‐diversity decreased over the months, yet these assembly patterns differed between years. This suggests major effects of seasonal and year‐to‐year dynamics on β‐diversity. Land use was also observed to be a main driver: ditches in nature conservation areas had higher β‐diversity and temporal heterogeneity was lowest in ditches adjacent to the most intensive agricultural land‐use category, indicating that agricultural practices can homogenise biodiversity in both space and time. By analysing the spatial and temporal β‐diversity patterns in freshwater macrofaunal communities in concert, we have shown that β‐diversity is a sensitive and highly informative metric of both spatial and temporal changes in community composition.

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“…, Goldenberg Vilar et al. ). The most striking direct effect of eutrophication on animal communities stems from large increases in benthic biomass, which in turn can lead to precipitous declines in dissolved oxygen concentrations following senescence and decomposition in the basal compartment (Carpenter et al.…”

Section: Introductionmentioning

confidence: 99%

Freshwater eutrophication drives sharp reductions in temporal beta diversity

Cook

Housley

Back

et al. 2017

Ecology

109

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Abstract. Eutrophication has become one of the most widespread anthropogenic forces impacting freshwater biological diversity. One potentially important mechanism driving biodiversity changes in response to eutrophication is the alteration of seasonal patterns of succession, particularly among species with short, synchronous, life cycles. We tested the hypothesis that eutrophication reduces seasonally driven variation in species assemblages by focusing on an understudied aspect of biodiversity: temporal beta diversity (b t ). We estimated the effect of eutrophication on b t by sampling benthic macroinvertebrate assemblages bimonthly for two years across 35 streams spanning a steep gradient of total phosphorus (P) and benthic algal biomass (as chlorophyll a [chl a]). Two widely used metrics of b diversity both declined sharply in response to increasing P and chl a, regardless of covariates. The most parsimonious explanatory model for b t included an interaction between P and macroinvertebrate biomass, which revealed that b t was lower when macroinvertebrate biomass was relatively high. Macroinvertebrate biomass explained a greater amount of deviance in b t at lower to moderate concentrations of P, providing additional explanatory power where P concentration alone was unable to fully explain declines in b t . Chl a explained similar amounts of deviance in b t in comparison to the best P model, but only when temperature variability, which was positively related to b t , also was included in the model. Declines in b t suggest that nutrient enrichment decreases the competitive advantage that specialists gain by occupying particular temporal niches, which leads to assemblages dominated by generalists that exhibit little seasonal turnover. The collapse of seasonal variation in assemblage composition we observed in our study suggests that treating dynamic communities as static assemblages is a simplification that may fail to detect the full impact of anthropogenic stressors. Our results show that eutrophication leads to more temporally homogenous communities and therefore degrades a fundamental facet of biodiversity.

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Eutrophication decreases distance decay of similarity in diatom communities

Cited by 53 publications

References 53 publications

Metagenomic assessment of viral diversity in Lake Matoaka, a temperate, eutrophic freshwater lake in southeastern Virginia, USA

Metagenomic assessment of viral diversity in Lake Matoaka, a temperate, eutrophic freshwater lake in southeastern Virginia, USA

Spatial and temporal homogenisation of freshwater macrofaunal communities in ditches

Freshwater eutrophication drives sharp reductions in temporal beta diversity

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