Search results for "Aranea"
showing 10 items of 11 documents
Standardised spider (Arachnida, Araneae) inventory of Lammi, Finland
2020
In June 2019, an ecology field course of the University of Helsinki was held at Lammi Biological Station, Southern Finland. Within this course, the students familiarised themselves with field work and identification of spiders and explored the diversity of species in the area. Three sampling plots were chosen, one in grassland and two in boreal forest, to demonstrate the sampling techniques and, by applying a standardised protocol (COBRA), contribute to a global spider biodiversity project. The collected samples contained a total of 3445 spiders, of which 1956 (57%) were adult. Only adult spiders were accounted for in the inventory due to the impossibility of identification of juveniles. A …
Standardised spider (Arachnida, Araneae) inventory of Kilpisjarvi, Finland
2020
Abstract Background A spider taxonomy and ecology field course was organised in Kilpisjarvi Biological Station, northern Finland, in July 2019. During the course, four 50 × 50 m plots in mountain birch forest habitat were sampled following a standardised protocol. In addition to teaching and learning about spider identification, behaviour, ecology and sampling, the main aim of the course was to collect comparable data from the Kilpisjarvi area as part of a global project, with the purpose of uncovering global spider diversity patterns. New information A total of 2613 spiders were collected, of which 892 (34%) were adults. Due to uncertainty of juvenile identification, only adults are includ…
Revision of the calcareous fen arachnofauna: habitat affinities of the fen-inhabiting spiders
2018
Calcareous fens are one of the most species-rich habitats of the temperate zone of the Northern Hemisphere. In spite of this species richness, however, calcareous fens are still rather poorly investigated. Consequently, the data of the fen-associated spider fauna are also largely lacking. The aim of the research was to study the spider fauna of the calcareous fens of Latvia and to draw conclusions about what kind of spider species and ecological groups typically inhabit calcareous fen habitats. Spiders were sampled in the summer months of 2010, 2011, and 2012 at nine different calcareous fens of the coastal lowland of Latvia. The spider collection was performed by pitfall traps and a sweep …
The arthropod community of boreal Norway spruce forests responds variably to stump harvesting
2016
Forest fuel harvesting increases the need to collect not just logging residues but also tree stumps from harvested stands. This biomass removal has raised concern over forest biodiversity. Here, the effects of stump harvesting on spiders, ants, harvestmen, ground beetles and epiedaphic springtails occupying boreal Norway spruce (Picea abies) forest floor were studied two and five years after harvesting by comparing pitfall trap samples from clear-cut sites with and without subsequent stump harvesting and from unharvested mature forests in central Finland. At harvested sites, traps were placed both on intact and exposed mineral soil surface. Open-habitat and generalist ground beetles benefit…
SICILIAN NATURALISTIC NEWS: 11 Aclista alticollis; 12 Mycomya (Mycomya) prominens; 13 Empis (Leptempis) confusa; 14 Sciapus platypterus; 15 Myopa pic…
2023
SICILIAN NATURALISTIC NEWS: 11 Aclista alticollis; 12 Mycomya (Mycomya) prominens; 13 Empis (Leptempis) confusa; 14 Sciapus platypterus; 15 Myopa picta; 16 Diaea dorsata; 17 Franklinothrips megalops; 18 Dasyhelea bilineata; 19 Forcipomyia (Synthridomyia) murina; 20 Forcipomyia (Euprojoannisia) psilonota; 21 Incertana drepanensis
Data from: Functional responses of multi-taxa communities to disturbance and stress gradients in a restored floodplain
2015
1. Trait-based approaches can reveal the mechanisms through which disturbances or stress impact communities, allowing comparisons of the role of different mechanisms in shaping communities among taxonomic groups. Such information can lead to higher comparability, transferability and predictability of the outcome of restoration projects. However, multitaxa trait-based approaches were rarely used in the context of ecosystem restoration. 2. We investigated the responses to environmental gradients of seven taxa (vascular plants, staphylinid and carabid beetles, spiders, isopods, diplopods and earthworms) in a restored floodplain using a species traits approach. We assessed the impact of flood d…
Sexual advertisement and immune function in an arachnid species (Lycosidae)
2004
A simple version of the immunocompetence handicap hypothesizes that through condition-dependence, the size of the sexual trait may be positively related to immune function at the population level. In the present study, we investigated the relationship between sexual advertisement and immune function in a natural population of male wolf spiders, Hygrolycosa rubrofasciata (Araneae: Lycosidae). Males of H. rubrofasciata have a costly and condition-dependent acoustic signal, courtship drumming. In the mating season, males drum against dry leaves while wandering around the habitat searching for receptive females. Males increase their mating success by increasing their drumming rate and mobility.…
On some new reports on the spider fauna of Italy and Sicily (Arachnida Araneae)
2022
New spiders (Arachnida Araneae) from Sicily (Italy) are reported, some new for Italy, in this paper. Particularly, twelve genera and sixteen new species are examined: Agelena orientalis C.L. Koch, 1837; Cyclosa algerica Simon, 1885; Larinia lineata (Lucas, 1846); Argenna patula (Simon, 1874), Lathys arabs Simon, 1910, Marilynia bicolor (Simon, 1870), Canariphantes zonatus (Simon, 1884), Cresmatoneta mutinensis (Canestrini, 1868), Diplocephalus graecus (O. Pickard-Cambridge, 1873), Lepthyphantes leprosus (Ohlert, 1865), Ostearius melanopygius (O. Pickard-Cambridge, 1880), Pelecopsis bucephala (O. Pickard-Cambridge, 1875), Pelecopsis inedita (O. Pickard-Cambridge, 1875), Lasaeola convexa (Bla…
Scelionidae (Hymenoptera: Platygastroidea) recorded in Italy and their known hosts.
2020
Scelionidi (Hymenoptera: Platygastroidea) segnalati per l’Italia e loro ospiti noti. Il seguente lavoro propone una revisione della checklist italiana della famiglia Scelionidae dopo quella proposta da Bin et al. (1995). Viene inoltre fornito l’elenco delle specie di ospiti di Insecta e Arachnida individuate nel lavoro di raccolta bibliografica. In totale sono riportati 38 generi di scelionidi per l’Italia con 181 specie di cui 58 riportano anche gli ospiti appartenenti agli ordini: Insecta: Mantodea, Orthoptera, Embioptera, Hemiptera, Coleoptera, Neuroptera, Diptera, Lepidoptera; Arachnida: Araneae Dysderiidae, Lycosidae. Grazie all'intenso lavoro di ricerca del professor Giovanni Mineo, r…
Data from: Effects of food abundance and early clutch predation on reproductive timing in a high Arctic shorebird exposed to advancements in arthropo…
2017
Climate change may influence the phenology of organisms unequally across trophic levels and thus lead to phenological mismatches between predators and prey. In cases where prey availability peaks before reproducing predators reach maximal prey demand, any negative fitness consequences would selectively favor resynchronization by earlier starts of the reproductive activities of the predators. At a study site in northeast Greenland, over a period of 17 years, the median emergence of the invertebrate prey of Sanderling Calidris alba advanced with 1.27 days per year. Yet, over the same period Sanderling did not advance hatching date. Thus, Sanderlings increasingly hatched after their prey was m…