Search results for "HABIT"

Hydraulic Habitat Structure Impacts Risk of Trematode Infection

2022

Abstract— Variability in infection rates of trematodes Diplostomum pseudospathaceum in 0+ rainbow trout Oncorhynchus mykiss under different hydraulic regimes was studied in the experimental setup with regulated flow rates and environmental heterogeneity. The average infection rate in the conditions of the current was 1.5 times less than that in the stagnant water. An increase of the flow rate from 3.2 to 11.3 cm/s did not result in lower infection rates, while the interindividual variability in the infection rate (coefficient of variation) tended to increase along with changing the still-water conditions (20%) to the high flow rate environments (40%) within the experiment. A decrease in th…

Contemporary spatial and environmental factors determine vascular plant species richness on highly fragmented meadows in Central Finland

2018

Context Habitat loss is a major threat to biodiversity. It can create temporal lags in decline of species in relation to destruction of habitat coverage. Plant species specialized in semi-natural grasslands, especially meadows, often express such extinction debt. Objectives We studied habitat loss and fragmentation of meadows and examined whether the changes in meadow coverage had caused an extinction debt on vascular plants. We also studied whether historical or present landscape patterns or contemporary environmental factors were more important determinants of species occurrence. Methods We surveyed the plant species assemblages of 12 grazed and 12 mown meadows in Central Finland and dete…

REMOTELY PILOTED AIRCRAFT SYSTEMS (RPAS) APPLICATION FOR STRUCTURE DESCRIPTION OF MEDITERRANEAN VERMETID REEFS

2016

Vermetid gastropods are coastal habitat engineers which build biogenic platforms typical of intertidal rocky shores of central and south -east of the Mediterranean. These bioconstructions create a secondary habitat which increases resource availability and space for organisms, locally transforming the environment and modifying coastal geomorphology. Biological characteristics and physical structure of these bioconstructions are commonly studied by field-based sampling. Nevertheless, a lot of time is required to collect data over large areas of reef, field conditions can impair data collection and direct reef image interpretation may be a challenge due to their intertidal position. In this s…

Combining population genomics with demographic analyses highlights habitat patchiness and larval dispersal as determinants of connectivity in coastal…

2022

Gene flow shapes spatial genetic structure and the potential for local adaptation. Among marine animals with nonmigratory adults, the presence or absence of a pelagic larval stage is thought to be a key determinant in shaping gene flow and the genetic structure of populations. In addition, the spatial distribution of suitable habitats is expected to influence the distribution of biological populations and their connectivity patterns. We used whole genome sequencing to study demographic history and reduced representation (double-digest restriction associated DNA) sequencing data to analyse spatial genetic structure in broadnosed pipefish (Syngnathus typhle). Its main habitat is eelgrass beds…

Cadenet. Oppidum du Castellar

2009

National audience

A new approach for assessing minimum flow in ephemeral streams

2009

The aim of this paper is to propose a new methodological approach, appropriate for low-yielding catchments, by calculating the ecological minimum river flow starting from the river water quality based on biological indicators and physical–chemical characteristics as reported in the Italian Water Law no. 152/06 and in the UE 2000/60 Directive (WFD: Water Framework Directive). Actually, protecting and restoring river flow regimes and hence the ecosystems they support by providing environmental flows, has become a major aspect of river basin management. In detail, pollutant concentrations downstream and fluvial structure cross-sections have been evaluated, starting from discharges released dow…

Environmental mitigation hierarchy and biodiversity offsets revisited through habitat connectivity modelling.

2020

International audience; Biodiversity loss is accelerating because of unceasing human activity and land clearing for development projects (urbanisation, transport infrastructure, mining and quarrying …). Environmental policy-makers and managers in different countries worldwide have proposed the mitigation hierarchy to ensure the goal of “no net loss (NNL) of biodiversity” and have included this principle in environmental impact assessment processes. However, spatial configuration is hardly ever taken into account in the mitigation hierarchy even though it would greatly benefit from recent developments in habitat connectivity modelling incorporating landscape graphs. Meanwhile, national, Euro…

Selezione dell’habitat in quattro specie ittiche criptobentoniche nell’infralitorale superiore di coste rocciose in Mediterraneo

2010

Habiter la jungle de Calais

2017

Mentre la politica di smantellamento dei campi di migranti continua, Éléonore Bully ripensa alle condizioni di vita nella "giungla di Calais" prima della sua distruzione nel 2016. Lei dimostra che, nonostante la precarietà dell'insediamento, le pratiche dei migranti ne hanno fatto un luogo di socievolezza e vita quotidiana dignitosa. Alors que la politique de démantèlement des campements de migrants se poursuit, Éléonore Bully revient sur les conditions d’habitat dans la « jungle de Calais » avant sa destruction en 2016. Elle montre que, malgré la précarité de l’installation, les pratiques des migrants en ont fait un lieu de sociabilité et de vie quotidienne digne.

Dynamics of Periphery. Atlas for Emerging Creative Resilient Habitats

2018

How can dynamic factors and dynamic phenomena outside of metropolitan cores be displayed for debates about territorial futures? Dynamics of Periphery showcases emerging creative and resilient habitat futures to develop concepts for metropolitan, urban, and rural networks—with a perspective not on urban margins, but on new places of community. The atlas displays integrative processdesign, pro-active context-building, and conceptual narratives as accelerators of change and new concepts in urbanism. These new concepts combine bottom-up and participatory approaches, the use of territorial capital, and the qualities of liveable spaces to create processual and strategic innovations across scales …