scholarly journals Temporal Dynamics of the Terrestrial Invertebrate Community Under Conditions of Land Reclamation

Agrology ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 21-32
Author(s):  
M. Fedyushko ◽  
A. Babchenko
Keyword(s):  
Temporal Dynamics ◽  
Land Reclamation ◽  
Invertebrate Community ◽  
Terrestrial Invertebrate

scholarly journals Riparian Vegetation Structure Influences Terrestrial Invertebrate Communities in an Agricultural Landscape

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 188
Author(s):  
Cristina Popescu ◽  
Mihaela Oprina-Pavelescu ◽  
Valentin Dinu ◽  
Constantin Cazacu ◽  
Francis J. Burdon ◽  
...  
Keyword(s):  
Riparian Vegetation ◽  
Human Impacts ◽  
Agricultural Landscapes ◽  
Riparian Buffers ◽  
Management Tool ◽  
Potential Contribution ◽  
Invertebrate Community ◽  
Invertebrate Communities ◽  
Terrestrial Invertebrate ◽  
Invertebrate Diversity

Stream and terrestrial ecosystems are intimately connected by riparian zones that support high biodiversity but are also vulnerable to human impacts. Landscape disturbances, overgrazing, and diffuse pollution of agrochemicals threaten riparian biodiversity and the delivery of ecosystem services in agricultural landscapes. We assessed how terrestrial invertebrate communities respond to changes in riparian vegetation in Romanian agricultural catchments, with a focus on the role of forested riparian buffers. Riparian invertebrates were sampled in 10 paired sites, with each pair consisting of an unbuffered upstream reach and a downstream reach buffered with woody riparian vegetation. Our results revealed distinct invertebrate community structures in the two site types. Out of 33 invertebrate families, 13 were unique to either forested (6) or unbuffered (7) sites. Thomisidae, Clubionidae, Tetragnathidae, Curculionidae, Culicidae, and Cicadidae were associated with forested buffers, while Lycosidae, Chrysomelidae, Staphylinidae, Coccinellidae, Tettigoniidae, Formicidae, and Eutichuridae were more abundant in unbuffered sites. Despite statistically equivocal results, invertebrate diversity was generally higher in forested riparian buffers. Local riparian attributes significantly influenced patterns in invertebrate community composition. Our findings highlight the importance of local woody riparian buffers in maintaining terrestrial invertebrate diversity and their potential contribution as a multifunctional management tool in agricultural landscapes.

scholarly journals Spatiotemporal dynamics of terrestrial invertebrate assemblages in the riparian zone of the Wewe river, Ashanti region, Ghana

2020 ◽  
Vol 15 (1) ◽  
pp. 331-345
Author(s):  
Collins Ayine Nsor ◽  
Samuel K. Oppong ◽  
Emmanuel Danquah ◽  
Michael Ochem ◽  
Osei Owusu Antobre
Keyword(s):  
Ecosystem Health ◽  
Riparian Zone ◽  
Spatiotemporal Dynamics ◽  
Geometric Series ◽  
Invertebrate Community ◽  
Wet Season ◽  
Disturbed Habitat ◽  
Ashanti Region ◽  
Terrestrial Invertebrate ◽  
Invertebrate Assemblages

AbstractThis study assessed invertebrate response to disturbances in the riparian zone of the Wewe river, using geometric series, rarefaction, Renyi diversity, and CCA models. We sampled 2,077 individuals (dry season) and 2,282 (wet season) belonging to 16 invertebrate orders. The severely disturbed habitat registered the highest individuals (n = 1,999), while the least was the moderately disturbed habitat (n = 740). Seasonal assemblages were not significantly different. Fire, farming, tree felling, and erosion explained 66.8% and 60.55% in the dry and wet seasons, respectively, of variations in invertebrate assemblages. This suggests threats to the invertebrate community and the riparian ecosystem health by anthropogenic interventions.

scholarly journals Aquatic and terrestrial invertebrate community responses to drying in chalk streams

2020 ◽  
Author(s):  
George Bunting ◽  
Judy England ◽  
Kieran Gething ◽  
Tim Sykes ◽  
Jon Webb ◽  
...  
Keyword(s):  
Invertebrate Community ◽  
Community Responses ◽  
Terrestrial Invertebrate ◽  
Chalk Streams

scholarly journals Temperature effects on the temporal dynamics of a subarctic invertebrate community

2021 ◽  
Author(s):  
Sinikka I. Robinson ◽  
Juha Mikola ◽  
Otso Ovaskainen ◽  
Eoin J. O’Gorman
Keyword(s):  
Temperature Effects ◽  
Temporal Dynamics ◽  
Invertebrate Community

scholarly journals Temporal Aspect of the Terrestrial Invertebrate Response to Moisture Dynamic in Technosols formed after Reclamation at a Post-Mining Site in Ukrainian Steppe Drylands

2021 ◽  
Vol 40 (2) ◽  
pp. 178-188
Author(s):  
Olexander Zhukov ◽  
Olga Kunah ◽  
Marina Fedushko ◽  
Anna Babchenko ◽  
Ava Umerova
Keyword(s):  
Soil Moisture ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Correspondence Analysis ◽  
Temporal Dynamics ◽  
Weighted Averaging ◽  
Terrestrial Invertebrates ◽  
Species Response ◽  
Terrestrial Invertebrate

Abstract Different approaches were applied to assess soil moisture optima and tolerance of the ecological niche temporal projection of terrestrial invertebrates within an experimental polygon created to investigate the reclamation processes after deep underground hard-rock mining in the Ukrainian steppe drylands. Sampling was carried out in 2013–2015 on a variant of artificial soil (technosols). To investigate the spatiotemporal variation in the abundance, species richness and species composition of invertebrate assemblages the animals were sampled using pitfall traps. The readily available water for plants, precipitation, wind speed, atmospheric temperature, atmospheric humidity, and atmospheric pressure were used as environmental predictors. The two-dimension geographic coordinates of the sampling locations were used to generate a set of orthogonal eigenvector-based spatial variables. Time series of sampling dates were used to generate a set of orthogonal eigenvector-based temporal variables. Weighted averaging, generalized linear mixed models, Huisman-Olff-Fresco models expanded by Jansen-Oksanen, correspondence analysis, and constrained correspondence analysis were used to estimate soil moisture species optima and tolerance. The moisture content in the technosols was revealed to be the most important factor determining the temporal dynamics of terrestrial invertebrate community in conditions of semi-arid climate and the ecosystem which formed as a result of the reclamation process. The species response to the soil water content is affected not only by the soil water content but also by the complex of the other environmental, temporal, and spatial factors. The effect of other factors on the species response must be extracted previously to find real estimations of the species optima and tolerance.

Ecosystem functioning of canopy- and turf- forming algae: contrasting supply of invertebrate prey to pelagic consumers

2020 ◽  
Vol 647 ◽  
pp. 79-92
Author(s):  
CK Figueiredo ◽  
RC Duarte ◽  
AAV Flores
Keyword(s):  
Community Assembly ◽  
Ecosystem Functioning ◽  
Temporal Dynamics ◽  
Invertebrate Community ◽  
Invertebrate Fauna ◽  
Invertebrate Prey ◽  
Trophic Resources ◽  
Juvenile Reef Fish ◽  
Invertebrate Assemblages ◽  
Algal Turfs

Macroalgal canopies are declining worldwide and are being replaced by low-lying algal turfs which frequently dominate reefscapes. Their loss may impact reef ecosystems in different ways, including the collapse of small canopy-dwelling invertebrates, and thus the decline of juvenile reef fish that prey on them. To evaluate this potential loss, we assessed (1) the differences between the mobile invertebrate assemblages associated with turf-forming (filamentous and articulated coralline turf) and canopy-forming (Sargassum spp. and Dichotomaria marginata) algae, and (2) the mechanisms underlying those contrasts by examining the invertebrate community assembly of filamentous turf and Sargassum spp. over the main canopy season. Abundance, biomass and diversity almost always differed between canopies and turfs (although not in a consistent way across sampling sites), while differences within canopy and turf algal types were nearly absent. The structure of invertebrate assemblages differed more consistently between canopies and turfs, with certain hard-bodied and soft-bodied invertebrates characterizing canopies and turfs, respectively. This divergence increased as the canopy season advanced. While no temporal changes occurred in turf invertebrate assemblages, clear temporal dynamics occurred in the invertebrate fauna associated with Sargassum. Brittle stars and amphipods were most abundant as early colonizers, followed by hard-shelled gastropods, bivalves and ostracods. By the end of the season, these groups became dominant and decreased diversity in the canopy habitat. As hard-shelled prey are preferred items for the main invertivore fish species in the area, results suggest that canopies may play an important role in the provisioning of trophic resources to pelagic consumers.

Effects of Monetary Incentives on Task Switching

2012 ◽  
Vol 59 (4) ◽  
pp. 216-226 ◽  
Author(s):  
Thomas Kleinsorge ◽  
Gerhard Rinkenauer
Keyword(s):  
Task Switching ◽  
Temporal Dynamics ◽  
Reward Processing ◽  
General Level ◽  
Monetary Incentives ◽  
Switch Costs ◽  
Expectancy Effect ◽  
Reward Expectancy ◽  
Trial Basis

In two experiments, effects of incentives on task switching were investigated. Incentives were provided as a monetary bonus. In both experiments, the availability of a bonus varied on a trial-to-trial basis. The main difference between the experiments relates to the association of incentives to individual tasks. In Experiment 1, the association of incentives to individual tasks was fixed. Under these conditions, the effect of incentives was largely due to reward expectancy. Switch costs were reduced to statistical insignificance. This was true even with the task that was not associated with a bonus. In Experiment 2, there was a variable association of incentives to individual tasks. Under these conditions, the reward expectancy effect was bound to conditions with a well-established bonus-task association. In conditions in which the bonus-task association was not established in advance, enhanced performance of the bonus task was accompanied by performance decrements with the task that was not associated with a bonus. Reward expectancy affected mainly the general level of performance. The outcome of this study may also inform recently suggested neurobiological accounts about the temporal dynamics of reward processing.

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