Search results for "Habit"
showing 10 items of 1816 documents
Nord-Pas-de-Calais, Lille, Pitgam, Crochte, Bissezeele, Socx, Quaëdypre, West-Cappel, Rexpoëde et Oost-Cappel : Gazoduc Artère des Flandres, lot 2 : …
2015
La tranche 2 de ce projet concerne les 23 km de gazoduc qui traverse d’ouest en est 8 communes rurales situées dans la partie septentrionale du département du Nord (Pitgam, Crochte, Bissezeele, Socx, Quaëdypre, West-Cappel, Rexpoëde et Oost-Cappel) afin de rejoindre la station de comptage à Hondschoote.Le tracé du gazoduc, d’ouest en est, s’étend à la limite de la plaine maritime flamande (Flandres maritime) et sur la plaine flamande intérieure (Flandres continentale) dont sa surface apparait ondulée et se compose d’une alternance de vastes plaines et de collines basses argileuses.L’époque protohistorique (Protohistoire ancienne, La Tène moyenne et finale) se caractérise par quatre vestiges…
Are woodland key habitats biodiversity hotspots in boreal forests?
2011
Background: The concept of Woodland Key Habitats (WKH, small-scaled presumed hotspots of biodiversity) has become an essential component of forest management in Fennoscandian and Baltic countries. There have been debates over the importance of WKHs in relation to production forests, and several research projects have focused on differences in biodiversity between the two. Results have been contradictory, and thus there is a need to summarize and clarify the existing knowledge. - Objectives: Our objective was to summarize knowledge on comparisons of several biodiversity qualities between WKHs and production forests in relevant countries i.e. the countries where WKH concept has been implement…
Archéogéographique du bassin versant du Haut Val Suzon
2022
Entre 2003 et 2020, les Bois de Cestres (St Martin-du- Mont) puis le Haut Val Suzon ont fait l’objet d’une enquête archéologique pluridisciplinaire. 26 sites y ont été découverts, dont un en bois de Cestres, a fait l’objet d’une fouille exhaustive. Initiée par Jean Louis Maigrot en 2003-2004, l’enquête a été reprise et conduite par Patrice Beck, professeur d’archéologie et d’histoire médiévale, aidé de Frank Faucher ingénieur au Service Régional de l’Archéologie à Dijon. Cette enquête a débouché sur deux publications aux éditions Mergoil :Beck P., Faucher F., Maigrot JL., (Sous la direction de) 2018. Elevage et Forêt sur la Montagne Dijonnaise à la fin du Moyen-âge. Deux établissements fore…
Offsetting harmful ecological impacts by restoring conservation areas
2019
Ihmistoiminnasta aiheutuvat ekologisesti haitalliset vaikutukset voidaan kompensoida tuottamalla luonnon kannalta hyötyjä, esimerkiksi ennallistamalla elinympäristöjä tai perustamalla uusia luonnonsuojelualueita. Elinympäristön ennallistaminen mahdollistaa elinympäristön palautumisen kohti luonnontilaa. Tämän tutkimuksen tarkoituksena oli selvittää, voitaisiinko jo aiemmin suojelluilla alueilla tehtävällä ennallistamisella saavuttaa ekologisessa kompensaatiossa tarvittava luontohyöty. Voi ehkä vaikuttaa siltä, että tällä tavoin tuotetut hyödyt eivät ole luonnon kannalta lisäisiä, koska toimenpiteet kohdistuvat alueisiin, jotka ovat jo suojeltu. Suomessa on kuitenkin tällä hetkellä monia suo…
Traits and phylogenies modulate the environmental responses of wood-inhabiting fungal communities across spatial scales
2022
Identifying the spatial scales at which community assembly processes operate is fundamental for gaining a mechanistic understanding of the drivers shaping ecological communities. In this study, we examined whether and how traits and phylogenetic relationships structure fungal community assembly across spatial scales. We applied joint species distribution modelling to a European-scale dataset on 215 wood-inhabiting fungal species, which includes data on traits, phylogeny and environmental variables measured at the local (log-level) and regional (site-level) scales. At the local scale, wood-inhabiting fungal communities were mostly structured by deadwood decay stage, and the trait and phyloge…
Impact of human disturbance and beliefs on the tree agama Acanthocercus atricollis atricollis in a South African communal settlement
2009
We investigated the effects of human disturbance and attitudes on the density of the tree agama Acanthocercus atricollis atricollis in a densely populated rural settlement in South Africa. In this environment agamas live on trees that are harvested for firewood or maintained for fruit production. We conducted visual encounter surveys of A. a. atricollis and interviewed local households to establish whether human attitudes and actions could affect tree agama populations. Although local residents viewed tree agamas negatively (50% of interviewees claimed to have killed an agama) and acted to exclude them from their environment, tree agama density in villages was higher than that of adjacent c…
Population Structure and Habitat Selection by Anisakis simplex in 4 Odontocete Species from Northern Argentina
2003
We described the population structure and habitat selection of Anisakis simplex in 46 franciscanas, Pontoporia blainvillei, 8 Burmeister's porpoises, Phocoena spinnipinis, 2 Dusky dolphins, Lagenorhynchus ob- scurus, and 2 common dolphins, Delphinus delphis, caught incidentally in the coastal fisheries of northern Argentina. Prevalence ranged from 50% to 100%, but mean intensities were low (1.0-3.6), suggesting that A. simplex has low recruitment rates to coastal dolphins in this area. Adult nematodes were found exclusively in the main stomach of 64.5% of franciscanas (the first stomach of this species) and the forestomach of 50% of Burmeister's porpoises and Dusky dolphins. Other developme…
Life in the ice lane: the winter ecology of stream salmonids
2007
Despite the common view that conditions in winter strongly influence survival and population size of fish, the ecology of salmonids has not been as extensively studied in winter as in other seasons. In this paper, we review the latest studies on salmonid winter survival, habitat use, movement and biotic interactions as they relate to the prevailing physical and habitat conditions in rivers and streams. The majority of research conducted on the winter ecology of salmonids has been carried out in small rivers and streams, where temperatures are above zero and where there is no ice. Investigations in large rivers, regulated and dredged rivers, and under conditions of different ice formations a…
Patterns in rotifer diapausing egg banks: Density and viability
2006
Here we present a quantitative study on the density, age and viability of the diapausing egg banks of the rotifer species complex Brachionus plicatilis in the sediments of 15 water bodies from Eastern Spain. Sampled ponds, located in coastal and inland areas, varied in salinity and ranged in size, depth and permanence. By identifying ‘hatched’, ‘deteriorated’ and ‘viable’ diapausing eggs in the sediment samples, we estimated production, hatching and deterioration in relation to the habitat properties of each pond. Our results indicate the presence of large numbers of diapausing eggs in the sediments of almost all of the ponds studied (2–115 eggs cm −2 ). Inland ponds tended to have higher d…
Isoëtes todaroana (Isoëtaceae, Lycopodiophyta), a New Species from Sicily (Italy)
2009
Isoetes todaroana, a new species from western Sicily (Italy), is described. Morpholog- ical, anatomical and ecological characters are given. The main differential characters are the presence of only two leaf air chambers, rather than four as in all other known species of the genus, and the shape of the scales, which have two lateral rounded lobes and one central spine-like lobe, together with its peculiar calcophilic habitat. So far, the species is known from a single locality.