نتایج جستجو برای: spom

تعداد نتایج: 22  

2012
Jean-Michel Mortillaro François Rigal Hervé Rybarczyk Marcelo Bernardes Gwenaël Abril Tarik Meziane

One of the greatest challenges in understanding the Amazon basin functioning is to ascertain the role played by floodplains in the organic matter (OM) cycle, crucial for a large spectrum of ecological mechanisms. Fatty acids (FAs) were combined with environmental descriptors and analyzed through multivariate and spatial tools (asymmetric eigenvector maps, AEM and principal coordinates of neighb...

A Dalman AR Nematei P Eftekhari Yazdi R Hajihoseini S Maroufizadeh Z Vahabi,

Background We have previously reported the effect of Anthocyanin and cAMP modulators on maturation and apoptosis of sheep oocytes. In this study, we investigated the reduction capacity and apoptotic gene expression results at MII sheep oocytes. MaterialsAndMethods Good ovine Cumulus-oocyte complexes (COCs) were transferred to Pre-IVM medium, then to two type IVM mediums: 1) 0.1μg/ml Delphinidin...

2012
Candida Savage Simon F. Thrush Andrew M. Lohrer Judi E. Hewitt

BACKGROUND Estuaries are highly productive ecosystems that can export organic matter to coastal seas (the 'outwelling hypothesis'). However the role of this food resource subsidy on coastal ecosystem functioning has not been examined. METHODOLOGY/PRINCIPAL FINDINGS We investigated the influence of estuarine primary production as a resource subsidy and the influence of estuaries on biodiversit...

Journal: :Frontiers in Marine Science 2022

Hydrothermal vents have been recognised as isolated islands of productivity in the deep sea, but very little is known about transport and export chemoautotrophic produced organic carbon to vent surrounding habitats. Here, we investigate its influence on benthic food webs sediments at Rainbow (RB) field Mid Atlantic Ridge ~2200 m water depth. Two sites were considered along dispersal direction R...

2017
Samuel Soubeyrand Anna-Liisa Laine Ilkka Hanski

The dispersal ability of a species will be critical for how population dynamics are realized in spatially structured systems. To date, the effect of group dispersal on metapopulation dynamics is poorly understood. Here, we investigate how group dispersal and Allee effects shape metapopulation dynamics identifying conditions in which group dispersal can be an advantage over independent dispersal...

Journal: :The American naturalist 2004
Otso Ovaskainen Ilkka Hanski

Spatially structured populations in patchy habitats show much variation in migration rate, from patchy populations in which individuals move repeatedly among habitat patches to classic metapopulations with infrequent migration among discrete populations. To establish a common framework for population dynamics in patchy habitats, we describe an individual-based model (IBM) involving a diffusion ...

Journal: :Water 2022

The monthly phytoplankton communities and dietary items of the filter-feeding ark clam (Anadara kagoshimensis) in cultivation were examined a shallow temperate coastal embayment Yeoja Bay Korea, to identify changes clams associated with community patterns. A self-organizing map (SOM) algorithm was applied shape structures phytoplankton. Clam δ13C δ15N values determined compared those phytoplank...

Journal: :Frontiers in Marine Science 2021

Aulacomya atra is an active suspension feeder, spatially dominant in the shallow-water hard-bottom benthic communities of Chilean Patagonia fjords. In this region, vertical flux autochthonous organic matter (OM) reaching benthos augmented by allochthonous OM both from a terrestrial origin and intensive salmon farming. This mixed pool represents potential source food for variety consumers, but t...

2016
Hend Mikhail Salama Hebatallah Nour-Eldein

Background: Satisfaction is an indirect performance measure to the effectiveness of a curriculum. Faculties which provide professional education should be concerned with students’ satisfaction as an educational process outcomes. Objective 1to evaluate medical students’ satisfaction with clinical education and factors in the organizational domain that could influence their satisfaction. Objectiv...

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