Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 35 for “"collembola"”.
-
Ecology of Soil Collembola from Fontenelle Forest
The Collembola, an order of apterous insects, have been studied by ecologists interested in populations of soil organisms in an effort to delimit the requirements of these organisms in a soil ecosystem. Soil is an open ecosystem; thus, there are many variables which must be taken into …
-
Evolution and Classification of the Sminthuridae (Collembola)
Made available in DSpace on 2014-12-05T21:33:56Z (GMT). No. of bitstreams: 1 0018190.pdf: 5676136 bytes, checksum: 20c820fd4f9082d0b4cda034b47f5b57 (MD5) Previous issue date: 1956
-
The resilience of Polar Collembola to climate change
Polar Collembola have adapted over millions of years to an environment that is changing faster than any other on earth. Globally, Collembola (springtails) are among the most abundant and widely-distributed arthropods and are key components of species-poor polar ecosystems. Understanding the …
-
A Revision of the Scaled Orchesellinae (Insecta: Collembola: Entomobryidae)
Made available in DSpace on 2014-12-14T07:04:03Z (GMT). No. of bitstreams: 1 7821000.pdf: 10659807 bytes, checksum: 4200ce3d203661c8aaa9c9ad69be53d0 (MD5) Previous issue date: 1978
-
Fluctuations in Populations of Collembola in East-Central Illinois
Made available in DSpace on 2014-12-10T18:13:25Z (GMT). No. of bitstreams: 1 6511738.pdf: 4215816 bytes, checksum: 0f2294a67ef7c939153caf0fd9319e14 (MD5) Previous issue date: 1965
-
Population genetic structure of Antarctic springtails (Collembola) and New Zealand damselflies (Odonata)
… Antarctic springtail Gomphiocephalus hodgsoni (Collembola) in Taylor Valley, southern Victoria Land. The observed distribution was congruent with a hypothesis of multiple refugia during the Pleistocene glaciations and a barrier to gene flow by a glacial lake. Chapter II assesses the genetic …
-
Taxonomia e Distribuição de Collembola Poduromorpha da Restinga de Itaipuaçu, Maricá, RJ
From May 1995 to April 1996 monthly samples of litter/soil were taken in three areas at restinga of Itaipuaçu: outer sandy ridge, inner sandy ridge and swamp area. From the 14.134 collected springtails, 5.556 belonged to the Order Poduromorpha, distributed among 3 families, 6 subfamilies, 15 genera …
-
A contribution to species delimitation and taxonomy of North American Entomobrya (Collembola: Entomobryidae)
… phylogenetic studies have revealed that Collembola diversity estimates based on morphological characters have been greatly underestimated. High levels of DNA sequence divergence among congeneric species suggest that circumscription of species based solely on traditional morphological and …
-
Belowground success: Collembola as indicators of restoration progress following active and passive restoration
… belowground soil fauna. This study assessed Collembola (springtail) communities between active and passive restoration sites in comparison to invaded, non-restored sites as reference sites. Sampling was conducted during winter (2020) and winter and spring (2021) to consider the seasonal …
-
Nitrification inhibitors have minimal impact on microbial and Collembola communities in Danish arable soil
… inhibitors (NIs) on the soil microbial and collembola communities in arable soils under a spring barley cultivation system. By assessing soils where inhibitors were repeatedly applied alongside fertilizers, we evaluated the short-term effects of NI use on soil biodiversity and function …
-
The influence of vicariance and dispersal on the diversification and evolution of springtails (collembola)
… and maintenance of biodiversity in springtails (Collembola). This class of tiny, wingless insect-like hexapods includes some of the most abundant (and perhaps, most diverse) arthropods on earth. They have colonized, diversified, and adapted to nearly every terrestrial habitat from marine …
-
Samfélög mítla (Acari) og stökkmors (Collembola) í mismunandi gróðurframvindu, 20 árum eftir uppgræðslu á Geitasandi
Víða á Íslandi hefur ýmsum aðferðum verið beitt til að græða upp land og bæta virkni vistkerfa. Við mat á gildi uppgræðsluaðgerða hefur verið horft til fjölda eiginleika vistkerfa, þar á meðal þróunar gróðursamfélaga eða kolefnisbindingar. Undanfarin ár hefur nauðsyn þess að taka tillit til …
-
Contribuição para o conhecimento de Collembola entomobryomorpha (Insecta) do Parque Nacional da Tijuca, Rio de Janeiro, Brasil
Taxonomic and distributional study of the springtails belonging to the suborder Entomobryomorpha from Parque Nacional da Tijuca is presented. Sixty samples with 31.403 specimens were collected at eleven different localities from February 1979 through February 1980. Twenty species, incluing one not …
-
A molecular phylogeny of the families and orders of Collembola (Arthropoda: Hexapoda) using the 18S rDNA gene
… relationships of the families and orders of Collembola, with special reference to six groups that traditionally have been problematic, or that have become problematic with the implementation of the cladistic philosophy to the systematics of the group. Some authors have questioned the …
-
Taxonomia e distribuição do gênero Isotomiella Bagnall, 1939 (Collembola, Isotomidae) na Floresta da Tijuca, Rio de Janeiro, RJ, Brasil
The taxonomy and ecology of the fauna of Isotomiella Bagnall, 1939 was studied in four areas at Floresta da Tijuca, from August/ 1999 to July /2000. Twenty-four monthly collections were made in litter and soil, totaling about 18.000 springtails, from which 3.552 belong to the genus Isotomiella. …
-
Exemplo de uma sucessão faunística durante a decomposição em um amontoado de folhiço
… decomposition of the litter were respectively: Collembola, Isopoda and Acarina. The 19 faunistic groups found were taxionomically defined at level order. Among them, Collembola deserved a more detailed analysis and, consequently, their specimens are identified in accordance with the …
-
Ants and spiders in grassland food webs
… stark räuberische Einflüsse auf Zersetzer (Collembola) und Herbivore (Zikaden). Ein Experiment offenbarte starke Intraguilden Interaktionen zwischen Ameisen und Spinnen. Im Gegensatz dazu, fanden wir in einem kleinräumigen Freilandexperiment einen positiven Einfluss der Ameisenart Lasius …
-
Colonisation and diversification in invertebrates: looking within species on islands to connect pattern and process
… genetic admixture (first gap). I characterise Collembola evolutionary diversity within Tenerife and the distribution of lineage colonisation times, and reveal this fauna to be represented by a mosaic of very old lineages and a large number of very recently arrived lineages (second gap). …
-
The effect of habitat structure on reproduction and prey capture of a rare carnivorous plant, Pinguicula lutea
… but outcrossing species. Its primary prey are Collembola and small Diptera. In 2014 and 2015 populations were identified occupying three types of habitat structure: maintained (mowed), grassy (dense Aristida stricta var. beyrichiana), and woody (Hypericum/Ilex mix). Reproductive output was …
Page 1 of 2