Intermediate Disturbance Hypothesis in Ecology: A Literature Review

Moi, Dieison André; García-Ríos, Raúl; Zhu, Hong; Daquila, Bruno Vinícius; Mormul, Roger Paulo

doi:10.5735/086.057.0108

Cited by 36 publications

(8 citation statements)

References 61 publications

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“…The abundance, species diversity and species abundance of bacterial communities in the rhizospheric soils of moderately deteriorated steppes are the highest and most stable. It is speculated that bacterial diversity is related to grassland degradation and that appropriate interference can improve the species diversity of rhizospheric soil bacterial communities in grasslands ( Dieison et al, 2020 ), which is line with the intermediate disturbance hypothesis ( DiTommaso & Aarssen, 1989 ). The results of this study provide a basis for the future ecological restoration of desert steppes in Inner Mongolia.…”

Section: Discussionmentioning

confidence: 73%

Bacterial diversity of herbal rhizospheric soils in Ordos desert steppes under different degradation gradients

Guo,

Zhang,

2023

PeerJ

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Objectives This study explored the effects of different degradation gradients on bacterial diversity in the rhizospheric soils of herb plants. Methods The alpha diversity, species composition and correlations of bacterial communities in the rhizospheric soils of herb plants were studied using metagenomics 16SrDNA gene high-throughput sequencing. Results The diversity of bacterial communities in the rhizospheric soils of herb plants differed during the degradation of desert steppes. An analysis of bacterial community alpha diversity indices showed the bacterial diversity and species evenness of rhizospheric soils were best in moderately degraded desert steppes. Among all samples, a total of 43 phyla, 133 classes, 261 orders, 421 families, 802 genera and 1,129 species were detected. At the phylum level, the predominant bacterial phyla were: Actinobacteria, Proteobacteria, Acidobacteria, Gemmatimonadetes, Chloroflexi, Planctomycetes and Bacteroidetes. At the genus level, the predominant bacterial genera were: RB41, Sphingomonas, WD2101_soil_group_unclassified, Pseudomonas and Actinomyces. The relative abundance of unknown genera was very large, which deserves further research. At the phylum and genus levels, the species abundance levels under slight and moderate degradation were significantly higher than those under extreme degradation. Correlation network diagrams showed there were many nodes in both slightly deteriorated and moderately deteriorated soils, and the node proportions were large and mostly positively correlated. These results indicate the bacterial communities in rhizospheric soils under slight or moderate deterioration are relatively stable. The rhizospheric soil microbes of desert steppes can form a stable network structure, allowing them to adequately respond to environmental conditions. Conclusions The bacterial communities in the rhizospheric soils of herb plants differ between different degradation gradients. The species number, abundance and diversity of bacterial communities in rhizospheric soils are not directly correlated with degree of degradation. The abundance, species diversity and species abundance of bacterial communities in the rhizospheric soils of moderately degraded desert steppes are the highest and most stable. The soil bacterial diversity is lowest in severely degraded desert steppes.

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Section: Discussionmentioning

confidence: 73%

Bacterial diversity of herbal rhizospheric soils in Ordos desert steppes under different degradation gradients

Guo,

Zhang,

2023

PeerJ

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Section: Effect Of Anthropogenic Disturbances On Diversity and Assemb...mentioning

confidence: 71%

“…Our results indicate a decrease of phylogenetic and ecological diversity with the increase of local disturbances. Previous studies showed contrasted results concerning this question but an increase of diversity in several taxa was observed (Galand et al, 2016; Geedicke et al, 2016; Murray et al, 2017), suggesting that disturbances could promote the cohabitation of different species and support the intermediate disturbance hypothesis (Moi et al, 2020). Regarding functional diversity, our study showed antagonistic results with a significant decrease of ecological diversity with increasing disturbances and, on the contrary, a weak increase of morphological diversity with disturbances, confirming contrasted responses between ecological and morphological diversity previously observed at the European scale (Kuczynski et al, 2018).…”

Section: Discussionmentioning

confidence: 87%

Disentangling the effects of different human disturbances on multifaceted biodiversity indices in freshwater fish

Côte

Poulet

Blanc³

et al. 2023

Ecological Applications

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Evaluating the effects of anthropogenic pressures on several biodiversity metrics can inform the management and monitoring of biodiversity loss. However, the type of disturbances can lead to different responses in different metrics. In this study, we aimed at disentangling the effects of different types of anthropogenic disturbances on freshwater fish communities. We calculated diversity indices for 1109 stream fish communities across France by computing richness and evenness components for ecological, morphological, and phylogenetic diversity, and used null models to estimate standardized effect sizes. We used generalized linear mixed models to assess the relative effects of environmental and anthropogenic drivers in driving those diversity indices.Our results demonstrated that all diversity indices exhibited significant responses to both climatic conditions and anthropogenic disturbances. While we observed a decrease of ecological and phylogenetic richness with the intensity of disturbance, a weak increase in morphological richness and evenness was apparent. Overall, our results demonstrated the importance of disentangling various types of disturbances when assessing human-induced ecological impacts and highlighted that different facets of diversity are not impacted identically by anthropogenic disturbances in stream fish communities. This calls for further work seeking to integrate biodiversity responses to human disturbances into a multifaceted framework, and could have beneficial implications when planning conservation action in freshwater ecosystems.

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“…In bees with intermediate values of removal to the scopa, the constant removal and mixing of pollen grains from superficial layers generate a pattern of high pollen diversity in intermediate layers. Higher diversity values in regions with neither too rare nor too frequent disturbance have been hypothesized and demonstrated in several ecological systems, especially at the community level (Moi et al 2020). In such dynamic and non-equilibrium systems, diversity increases when a new patch of an unoccupied habitat is available until the access to resources becomes limited and lower competitors are displaced or even excluded.…”

Section: Discussionmentioning

confidence: 97%

Pollinator Grooming Behavior Alters Pollen Landscapes on Bees’ Bodies and Increases Pollen Carryover to Other Flowers

Marcelo

Marquitti

Vallejo‐Marín

et al. 2022

Preprint

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Pollen participates both as the carrier of male gametes in the reproduction of flowering plants and as a key resource exploited by floral visitors, especially bees. Pollinator behavior significantly alters the patterns of pollen removal and deposition, often called pollen fates. To date, few theoretical investigations have attempted to jointly model patterns of pollen transfer and pollinator behavior, and empirical studies are restricted to species to which pollen movement can be tracked. Here we use a spatially explicit agent-based modeling approach, to determine how bee grooming behavior may alter pollen fates and affect plant reproduction. Specifically, we asked whether pollen mixing and removal during pollen grooming may change the pollen landscape on a bee body consequently affecting both pollen export by the anthers and deposition onto stigmas. Our model shows that both mixing and removal behaviors restructure the pollen landscape on the bee body, increasing pollen carryover (deposition in consecutive visits), and increasing pollen diversity (number of pollen donors) onto stigmas in sequential flower visits. Our results counterintuitively show that pollen grooming may have a positive effect on both male and female finesses during plant reproduction.

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Intermediate Disturbance Hypothesis in Ecology: A Literature Review

Cited by 36 publications

References 61 publications

Bacterial diversity of herbal rhizospheric soils in Ordos desert steppes under different degradation gradients

Bacterial diversity of herbal rhizospheric soils in Ordos desert steppes under different degradation gradients

Disentangling the effects of different human disturbances on multifaceted biodiversity indices in freshwater fish

Pollinator Grooming Behavior Alters Pollen Landscapes on Bees’ Bodies and Increases Pollen Carryover to Other Flowers

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