نتایج جستجو برای: meadows

تعداد نتایج: 2563  

Journal: :Marine pollution bulletin 2011
M M van Katwijk M E W van der Welle E C H E T Lucassen J A Vonk M J A Christianen W Kiswara I Inayat al Hakim A Arifin T J Bouma J G M Roelofs L P M Lamers

In remote, tropical areas human influences increase, potentially threatening pristine seagrass systems. We aim (i) to provide a bench-mark for a near-pristine seagrass system in an archipelago in East Kalimantan, by quantifying a large spectrum of abiotic and biotic properties in seagrass meadows and (ii) to identify early warning indicators for river sediment and nutrient loading, by comparing...

2016
Emily Palmer

Studies about the relationship between diversity and stability have reached varying conclusions. I used plant-pollinator interaction data sampled from meadows in the HJ Andrews to examine this relationship. I found a clear reciprocal relationship between the number of species in an interaction network and the connectance of the network, as theoretically expected. The number of plant and pollina...

2017
Ilkka Hanski Torsti Schulz Swee Chong Wong Virpi Ahola Annukka Ruokolainen Sami P Ojanen

Ecologists are challenged to construct models of the biological consequences of habitat loss and fragmentation. Here, we use a metapopulation model to predict the distribution of the Glanville fritillary butterfly during 22 years across a large heterogeneous landscape with 4,415 small dry meadows. The majority (74%) of the 125 networks into which the meadows were clustered are below the extinct...

Journal: :Marine pollution bulletin 2016
Arnaud Abadie Pierre Lejeune Gérard Pergent Sylvie Gobert

Intensive anchoring of leisure boats in seagrass meadows leads to mechanical damages. This anthropogenic impact creates bare mat patches that are not easily recolonized by the plant. Several tools are used to study human impacts on the structure of seagrass meadows but they are not able to assess the indirect and long term implication of mechanical destruction. We chose to investigate the possi...

Journal: :Kansas Agricultural Experiment Station Research Reports 2021

Three different herbicides were applied at early bromegrass greenup and post hay harvest to assess their effectiveness in controlling foxtail two producer meadow sites Pottawatomie (PT) Dickinson (DK) counties. Pendimethalin resulted the greatest control, but control did not extend through season reduce late-summer infestations. Metsulfuron approximately 30% visible brome injury. The injury was...

2013
Alice Rotini Letizia Anello Maria Di Bernardo Agata Giallongo Luigi Valiante Luciana Migliore

Posidonia oceanica meadows are experiencing a progressive decline, and monitoring their status is crucial for the maintenance of these ecosystems. We performed a comparative analysis of bed density, total phenol content and protein expression pattern to assess the conservation status of Posidonia plants from the S. Marinella (Rome, Italy) meadow. The total phenol content was inversely related t...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Jens Roland Stephen F Matter

Over the past 50 years, the rising tree line along Jumpingpound Ridge in the Rocky Mountains of Alberta, Canada, has reduced the area of alpine meadows and isolated populations that reside within them. By analyzing an 11-year data set of butterfly population sizes for 17 subpopulations along the ridge, we show that forest habitat separating alpine meadows decouples the dynamics of populations o...

Journal: :Plant Biology and Horticulture: theory, innovation 2019

Journal: :Journal of Applied Logic 2015

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