<i>Dolomedes plantarius</i> (Araneae, Pisauridae) in Belarus: records, distribution and implications for conservation

Ivanov, Vladislav; Prishepchik, Oleg; Сетракова, Е. М.

doi:10.5431/aramit5407

Cited by 6 publications

(9 citation statements)

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“…In Europe, this species is considered rare [Nentwig et al, 2018] and even endangered. For example, in Belarus D. plantarius is included in the Red Book [Ivanov et al, 2017]. The conformation of copulatory organs of the studied specimens (Figs 18-20) are evidence that they indeed belong to D. plantarius.…”

Section: Pholcidaementioning

confidence: 77%

On a small collection of spiders (Aranei) from the Astrakhan Reserve (Russia)

Пономарев

Bastaev

Dubovikoff

et al. 2018

Arthsel

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landscapes: viz., sandy massifs, meadows of different degrees of moistening, salt-marshes, Tamarix thickets, areas of dry steppe and desert vegetation, etc. The diversity of microclimate and vegetation promotes the coexistence of various ecological and zoogeographical animal groups in such a small territory. The spider fauna of the Astrakhan Reserve has been poorly studied yet. The first and to date the only list of spiders of the Reserve [Utochkin, 1971] contains 44 species only. Later [Ponomarev, 1981; Utochkin, 1985; Ponomarev et al., 2008], another 20 species were added to the list. Thus, to date a total of 64 spider species in 16 families has been recorded from the Reserve at hand. Below, we present the results of a spider survey in the Astrakhan Reserve based on the materials collected by us in 2017. The obtained data greatly expand our knowledge of its spider fauna. Material and methods The studied material was collected by V.V. Bastaev from the Damchik site of the Astrakhan Biosphere Reserve (Map 1) in the period from 26.06 to 3.07.2017. Different collecting methods, such as hand-collecting by means of forceps, aspirators and/or entomological nets, as well as pitfall traps and sifters, were used. A total of some 1500 spider specimens was collected, of which over 900 were adults. The material is shared between the collection of the St. Petersburg University and the personal collection of A.V. Ponomarev. Photographs were taken at the Southern Scientific Center of the Russian Academy of Sciences, by means of a microscope MICMED-6 using a SONY NEX-C3 16.2mp digital camera and Microphotoset (MFN-12). ABSTRACT. An annotated list of 89 spider species in 17 families found in the Damchik site of the Astrakhan Reserve (Russia) in 2017 is provided; of them 30 species are new to the fauna of Astrakhan Area, 57 species are first recorded from the Astrakhan Reserve; three species remain undetermined or determined provisionally: Haplodrassus sp., Poecilochroa cf. senilis, Heriaeus sp; 11 species are illustrated. How to cite this article:

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Section: Pholcidaementioning

confidence: 77%

On a small collection of spiders (Aranei) from the Astrakhan Reserve (Russia)

Пономарев

Bastaev

Dubovikoff

et al. 2018

Arthsel

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“…Yet, field observations suggest that both Dolomedes species also co-occur at finer spatial scales 35 . The discrete nature and propensity to hide and dive of D. plantarius 34 , together with possible misidentification 36 , 76 might explain the small number of records and of co-occurrences. In North America, closely related species of Dolomedes like D. trition and D. vittatus were reported to co-occur at small spatial scales 77 .…”

Section: Discussionmentioning

confidence: 99%

“…D. fimbriatus can nonetheless occupy the same habitat type as D. plantarius plus marshes, bogs, swampy forests or wet heathland 34 . Syntopy is then possible, as the two species can live close to each other 35 , for example around the same lake 36 , or in the ecotone habitat between bogs and ponds 37 . D. fimbriatus has a larger ecological niche: the species is more drought and shade tolerant 38 , e.g.…”

Section: Introductionmentioning

confidence: 99%

Explicit integration of dispersal-related metrics improves predictions of SDM in predatory arthropods

Monsimet

Devineau

Pétillon

et al. 2020

Sci Rep

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Fishing spiders (Dolomedes spp.) make an interesting model to predict the impact of global changes because they are generalist, opportunistic predators, whose distribution is driven mostly by abiotic factors. Yet, the two European species are expected to react differently to forthcoming environmental changes, because of habitat specialization and initial range. We used an original combination of habitat and dispersal data to revisit these predictions under various climatic scenarios. We used the future range of suitable habitat, predicted with habitat variables only, as a base layer to further predict the range or reachable habitat by accounting for both dispersal ability and landscape connectivity. Our results confirm the northward shift in range and indicate that the area of co-occurrences should also increase. However, reachable habitat should expand less than suitable habitat, especially when accounting for landscape connectivity. In addition, the potential range expansion was further limited for the red-listed D. plantarius, which is more of a habitat specialist and has a lower ability to disperse. This study highlights the importance of looking beyond habitat variables to produce more accurate predictions for the future of arthropods populations.

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“…Investigating the population decline is difficult, as historical distribution data of Dolomedes are scarce (Duffey 2012). Some authors suggest that there may be denser populations of D. plantarius than known, especially in the less monitored areas in eastern Europe (Ivanov et al 2017). Additionally, misidentifications of the two species were common in the first half of the 20th century, when body color was used for determination, although it is not a reliable indicator for the discrimination of both species (Bonnet 1930, van Helsdingen 1993.…”

mentioning

confidence: 99%

Characterization of habitat requirements of European fishing spiders

Dickel¹

2020

Preprint

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Wetlands are among the most threatened habitats in the world, and so are their species, which suffer habitat loss due to climate and land use changes. Freshwater species and arthropods receive little attention in research and conservation, and the goals to stop and reverse the destruction of wetlands published 25 years ago in a manifesto by the Union of Concerned Scientists have not been reached. In this study, we investigated the occurrence and habitat requirements at two spatial scales of two species of European fishing spiders Dolomedes, which rely heavily on declining wetland habitats in Sweden and southern Norway.We collected occurrence data for Dolomedes plantarius and Dolomedes fimbriatus, using a live-determination-method. We modelled the placement of nursery webs to describe fine scaled habitat requirements related to vegetation and microclimate. Using a machine learning approach, we described the habitat features for each species, and for co-occurrence sites, to provide insight into variables relevant for the detectability of Dolomedes.We found that habitat requirements were narrower for D. plantarius compared to D. fimbriatus; that the detection of nursery webs can be affected by weather conditions and that nursery placement is mostly dependent on the proximity to water, the presence of Carex sp. (Sedges) and of crossing vegetation structures, and on humidity. Furthermore, co-occurring sites were more similar to D. plantarius sites than to D. fimbriatus sites, whereby surrounding forest, water type and velocity, elevation and latitude were of importance for explaining which species of Dolomedes was present.We provide a detailed field protocol for Dolomedes studies, including a novel live-determination method, and recommendations for future field protocols.

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Dolomedes plantarius (Araneae, Pisauridae) in Belarus: records, distribution and implications for conservation

Cited by 6 publications

References 0 publications

On a small collection of spiders (Aranei) from the Astrakhan Reserve (Russia)

On a small collection of spiders (Aranei) from the Astrakhan Reserve (Russia)

Explicit integration of dispersal-related metrics improves predictions of SDM in predatory arthropods

Characterization of habitat requirements of European fishing spiders

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