نتایج جستجو برای: biota

تعداد نتایج: 5026  

Journal: :Journal of Crustacean Biology 2010

2015
Marie Dam Søren Christensen

To understand the responses to external disturbance such as defoliation and possible feedback mechanisms at global change in terrestrial ecosystems, it is necessary to examine the extent and nature of effects on aboveground-belowground interactions. We studied a temperate heathland system subjected to experimental climate and atmospheric factors based on prognoses for year 2075 and further expo...

2015
Jochem Kail Björn Guse Johannes Radinger Maria Schröder Jens Kiesel Maarten Kleinhans Filip Schuurman Nicola Fohrer Daniel Hering Christian Wolter Michael L Fine

River biota are affected by global reach-scale pressures, but most approaches for predicting biota of rivers focus on river reach or segment scale processes and habitats. Moreover, these approaches do not consider long-term morphological changes that affect habitat conditions. In this study, a modelling framework was further developed and tested to assess the effect of pressures at different sp...

2010
Vyacheslav P. Shuntov Olga S. Temnykh

In the analysis of the long-term changes in the biota of the macroecosystems of the Bering Sea, many researchers focus on а) global greenhouse warming, b) decadal changes in climate and oceanological regimes, and c) cascading changes at different trophic levels. We think that the association of the majority of significant biological events in the Bering Sea with irreversible greenhouse warming ...

Journal: :Molecular ecology 2010
Nathan G Swenson

The present-day spatial distribution of interspecific contact zones and intraspecific phylogeographical breaks provides a window into the past ecological and evolutionary processes that underlie speciation and species ranges. The clustering of contact zones and/or phylogeographical breaks in space indicates the suturing of diverged biotas. The presence of such suture zones indicates that simila...

2011
Johannes Lehmann Matthias C. Rillig Janice Thies Caroline A. Masiello William C. Hockaday David Crowley

Soil amendment with biochar is evaluated globally as a means to improve soil fertility and to mitigate climate change. However, the effects of biochar on soil biota have received much less attention than its effects on soil chemical properties. A review of the literature reveals a significant number of early studies on biochar-type materials as soil amendments either for managing pathogens, as ...

2017
Alessandra Pino Giuliana Giunta Cinzia L Randazzo Salvatore Caruso Cinzia Caggia Antonio Cianci

Background: Bacterial vaginosis is the most frequent condition associated to the vaginal microbiota imbalance, affecting about the 40-50% of women in the world. Even if antibiotics are effcetive for bacterial vaginosis treatment a long-term recurrence rates, higher than 70%, is recorded. Lactoferrin is an iron-binding glycoprotein with bacteriostatic and bactericidal properties. It owns the abi...

2013
Jenny Davis Alexandra Pavlova Ross Thompson Paul Sunnucks

Refugia have been suggested as priority sites for conservation under climate change because of their ability to facilitate survival of biota under adverse conditions. Here, we review the likely role of refugial habitats in conserving freshwater biota in arid Australian aquatic systems where the major long-term climatic influence has been aridification. We introduce a conceptual model that chara...

Journal: :Environmental science & technology 2009
Joel D Blair Michael G Ikonomou Barry C Kelly Blair Surridge Frank A P C Gobas

This study presents results of an analytical method developed for the quantification of monoalkyl phthalate esters (MPEs) in seawater, sediments, and biota. The method uses accelerated solvent extraction, solid-phase extraction, and liquid chromatography electrospray ionization tandem mass spectrometry (LC/ ESI-MS/MS). Results show the method is robust and can provide trace measurement of sever...

2017
Kurt O. Reinhart Ragan M. Callaway KURT O. REINHART RAGAN M. CALLAWAY

The primary hypothesis for successful exotic plant invasions is that the invaders have escaped the specialist consumers that control them (Enemy Release Hypothesis). However, few studies have rigorously tested this assertion with biogeographical experiments or considered the effects of soil organisms. We tested the Enemy Release Hypothesis and the enhanced role of mutualisms by comparing densit...

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