نتایج جستجو برای: margalef d

تعداد نتایج: 577766  

Journal: :Agronomy 2023

Studies on the impacts of fertilization plant production and species diversity are crucial for better maintaining stability grassland ecosystems restoring degraded grasslands. Using a controlled experimental platform in temperate Leymus chinensis meadow steppe ecosystem, effects different levels nitrogen (N) phosphorus (P) addition community structure, biomass allocation, diversity, correlation...

2012
B. E. Arellano J. Roca B. Alhaddad

Over the last 50 years, the world has faced an impressive growth of urban population. The walled city, close to the outside, an “island” for economic activities and population density within the rural land, has led to the spread of urban life and urban networks in almost all the territory. There was, as said Margalef (1999), “a topological inversion of the landscape”. The “urban” has gone from ...

2015
Jaber Aazami Abbas Esmaili Sari Asghar Abdoli Hormoz Sohrabi Paul J. Van den Brink

The objectives of this study were to assess the biological water of the Iranian Tajan River using different metrics, i.e., a Multimetric Macroinvertebrate Index (MMI) and a traits-based method. Twenty-eight physico-chemical parameters, 10 habitat factors, and abundance of macroinvertebrates were obtained for 17 sites. The Shahid-Rajaie dam divides the Tajan River into an up- and downstream part...

Journal: :Forests 2023

An understanding of soil moisture variation patterns under different plant community structures is crucial for the restoration vegetation in southern China karst regions. Therefore, four structure types: arbor + herb (AH), shrub (SH), (ASH), and (H), were selected as research objects. A sensor was used to monitor content 0–70 cm layer, analyze characteristics explore differences types. The resu...

Journal: :Egyptian Journal of Aquatic Biology and Fisheries 2022

The regular assessment of faunal diversity near the energy power plant has gained interest many researchers. activity and effluent discharged from have remarkably stressed adjacent assemblage alpha biotic community surrounding plant. Hence, this study aimed to assess fishes benthos in bordering areas Tanjung Kidurong Combined Cycle Power Plant (TKCCP), Bintulu Sarawak. investigation was conduct...

2011
Yongnian Gao Junfeng Gao Jiongfeng Chen Yan Xu Jiahu Zhao

Aquatic ecoregions were increasingly used as spatial units for aquatic ecosystem management at the watershed scale. In this paper, the principle of including land area, comprehensiveness and dominance, conjugation and hierarchy were selected as regionalizing principles. Elevation and drainage density were selected as the regionalizing indicators for the delineation of level I aquatic ecoregions...

2018
Andreea Cosoveanu Samuel Rodriguez Sabina Raimundo Cabrera

Artemisia is a plant genus highly studied for its medicinal applications. The studies on the associated fungal endophytes are scarce. Ten plants specimens of Artemisia thuscula from Tenerife and La Palma were sampled to isolate the endophytic fungi. Identification of the endophytic fungi was based on morphology, Internal Transcribed Spacer (ITS) and Large Subunit (LSU) regions sequencing and in...

Journal: :Frontiers in Marine Science 2023

Climate change is known to have significant impacts on coastal marine ecosystems. However, a good understanding of the exact requires consistent long-term monitoring programs, which are not available for many The Hudson River Estuary (HRE) provides critical habitats estuarine, freshwater, and diadromous species. Longitudinal Ichthyoplankton Survey Water Quality in Biological Monitoring Program ...

Journal: :Journal of Threatened Taxa 2022

This paper presents the spatial and temporal variation in diversity of malacofauna relation to water chemistry Aripal stream Kashmir Himalaya. A total 12 species were reported which belong four families, Lymnaeidae, Physidae, Planorbidae, Bithyniidae from class Gastropoda, two Cyrenidae Pisidiidae Bivalvia. The family Planorbidae contributed 34% annual molluscan population followed by Lymnaeida...

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