Ground beetles respond to grazing at assemblage level, rather than species-specifically: the case of Cretan shrublands

Kaltsas, Dimitris; Trichas, Apostolos; Kougioumoutzis, Konstantinos; Chatzaki, Maria

doi:10.1007/s10841-013-9553-0

Cited by 30 publications

(21 citation statements)

References 38 publications

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“…Also, Fox () argued that the three major mechanisms thought to produce hump‐shaped diversity‐disturbance relationships are logically invalid, whereas Sheil and Burslem () and Huston () criticised that questioning. At any rate, all previous studies conducted in Mediterranean ecosystems on different organisms – such as plants (Koniak & Noy‐Meir, ), carabid beetles (Kaltsas et al ., ), grasshoppers (Kati et al ., ), mammals (Goncalves et al ., ) and birds (Malavasi et al ., ) – have supported the IDH. This suggests that intermediate grazing might have positive effects on the diversity of organisms at least in the Mediterranean area characterised by at least an 8000 year‐long history of livestock management and grazing (Le Houerou, ; Marathianou et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Effects of grazing intensity on pollinator abundance and diversity, and on pollination services

Lázaro

Tscheulin

Devalez

et al. 2016

Ecological Entomology

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1. Pollinating insects provide important ecosystem services and are influenced by the intensity of grazing. Based on the Intermediate Disturbance Hypothesis (IDH), pollinator diversity is expected to peak at intermediate grazing intensities. However, this hump‐shaped relationship is rarely found. 2. The effect of grazing intensity was tested on flower cover, on the abundance and richness of bees, hoverflies and bee flies, and on pollination services to early‐flowering bee‐pollinated Asphodelus ramosus L. For that, we used data on 11 plant–pollinator phryganic communities from Lesvos Island (Greece) widely differing in grazing intensities. 3. Flower abundance and richness showed hump‐shaped relationships with grazing intensity. Grazing affected the abundance and richness of bees and hoverflies directly and also indirectly, through changes in the flower community. Grazing influenced directly the richness but not the abundance of bee flies. Overall, pollinator abundance and richness showed hump‐shaped relationships with grazing intensity, but variations in strength (hoverfly abundance) and direction (bee community) of the effect appeared along the season. Early in the season, grazing increased bee abundance but decreased richness, resulting in increased pollen limitation in A. ramosus. 4. The effects of grazing on pollinators vary with the intensity of the disturbance, generally supporting the IDH, and the timing of land‐use activities may influence pollination services. Management strategies should include moderate grazing levels to preserve overall diversity in this area, however, the conservation of particular early bee or bee‐pollinated species may benefit from reduced grazing in early spring.

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Section: Discussionmentioning

confidence: 99%

Effects of grazing intensity on pollinator abundance and diversity, and on pollination services

Lázaro

Tscheulin

Devalez

et al. 2016

Ecological Entomology

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“…However, such generalizations should be treated cautiously. The diversity patterns along disturbance regimes depend on the nature and intensity of disturbance (Kaltsas et al, 2013). Emphasis should be given to the implications of mortality, non-equilibrium dynamics and spatial heterogeneity; the three fundamental components of disturbance.…”

Section: Discussionmentioning

confidence: 99%

Ground spider assemblages (Araneae: Gnaphosidae) along an urban-rural gradient in the city of Heraklion, Greece

Kaltsas¹,

Panayiotou²,

Chatzaki³

et al. 2014

Eur. J. Entomol.

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Abstract. The responses of gnaphosid spiders to an urbanization gradient (urban-suburban-rural areas) were studied using pitfall traps in and near the city of Heraklion, in Crete, Greece, from October 2010 to October 2011. Our results indicate that richness and abundance of species of spiders decreased from the rural area to the center of the city, but not significantly so. Temporal beta diversity was significantly higher in urban areas, which indicates a high temporal variability in species composition of gnaphosid assemblages in the center of the city that takes the form of complementary rather than synchronized phenologies of co-occurring species, as expected in habitats degraded by high levels of disturbance. There was no specific pattern in the body size distribution of the gnaphosids along the urban-rural gradient, and thus the decrease in mean body size with increase in urbanization hypothesis was not supported by our results. However, the species composition recorded in urban areas was very different from that in suburban and rural areas. The percentage of individuals in the catches that were generalist species differed significantly along the gradient. As generalist gnaphosid species made up 72.01% of the total caught in the center of the city, and only 9.53% and 2.07% in suburban and rural areas respectively, our results support the opportunistic species hypothesis. Our analyses indicate that Urozelotes rusticus, a well known synanthropic species recorded for the first time in Greece, is an indicator of high levels of urbanization in Heraklion.

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“…For Coleoptera and Araneae, sample coverage varied between sites, but values were often above 75% (Table 1). Therefore, we considered it as fairly complete (Kaltsas, Trichas, Kougioumoutzis, & Chatzaki, 2013;Meijer, Whittaker, & Borges, 2011).…”

Section: Diversity Patterns and Inventory Completenessmentioning

confidence: 99%

Partitioning the effects of regional, spatial, and local variables on beta diversity of salt marsh arthropods in Chile

Coccia

Fariña

2019

Ecology and Evolution

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Aim We examined the influence of regional, spatial, and local variables (edaphic characteristics and vegetation structure) on patterns of arthropod variation along the Chilean coast by partitioning beta diversity into its turnover and nestedness components. Location 2,000 km along the coast of Chile. Methods We collected ground‐dwelling arthropod samples from nine marshes during two seasons. A clustering method was used to examine patterns of arthropod similarity across salt marshes. We also calculated multiple‐site beta diversity and partitioned it into its turnover and nestedness components. Variation partitioning was then used to identify the major drivers of their variation (regional, spatial, and local variables). We compared results for the whole arthropod community and for the most abundant, speciose, and functionally different groups, Crustacea, Coleoptera, and Araneae. Results Salt marsh arthropod similarities did not depend on the geographic proximity of sites. Arthropod beta diversity was mainly determined by its turnover component. A significant fraction of community variation was related to the spatially structured variation of climate or edaphic factors. However, the exclusive contribution of spatial variables had also a role. Main conclusions Each salt marsh on the Chilean coast has the capacity to accommodate unique invertebrate taxa. Species sorting along the climatic gradient together with dispersal‐based processes seems the key structuring force of the arthropods and Crustacean variation in the marshes we studied, while species sorting alone might be more important for Coleoptera variation.

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Ground beetles respond to grazing at assemblage level, rather than species-specifically: the case of Cretan shrublands

Cited by 30 publications

References 38 publications

Effects of grazing intensity on pollinator abundance and diversity, and on pollination services

Effects of grazing intensity on pollinator abundance and diversity, and on pollination services

Ground spider assemblages (Araneae: Gnaphosidae) along an urban-rural gradient in the city of Heraklion, Greece

Partitioning the effects of regional, spatial, and local variables on beta diversity of salt marsh arthropods in Chile

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