نتایج جستجو برای: richness margalef

تعداد نتایج: 20862  

Journal: :Journal of the Indian Society of Coastal Agricultural Research 2021

Canals of Sundarbans in India are highly vulnerable to anthropogenic pressures which directly or indirectly impact the biological components such ecosystems. Being at base trophic pyramid, phytoplankton is exposed environmental stressors and will be reflected upper strata aquatic food chain. Hence, communities along with their interrelationship parameters were assessed Bhetkimari canal, a semi-...

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: :Agriprima : journal of applied agricultural sciences 2023

Keberadaan gulma dipengaruhi oleh jenis pupuk yang diberikan pada tanaman budidaya. Setiap memiliki kandungan berbeda sehingga berpengaruh terhadap spesies tumbuh. Agar dapat mengetahui tumbuh perlu dilakukan identifikasi lahan Penelitian bulan Juni – Agustus 2021 di Kebun pertanian Kelompok Tani Sinar Harapan, Kota Tarakan Provinsi Kalimantan Utara. Metode penelitian yaitu metode sampling acak...

Journal: :Theor. Comput. Sci. 2003
Sanjay Jain Efim B. Kinber Rolf Wiehagen Thomas Zeugmann

Learning of recursive functions refutably informally means that for every recursive function, the learning machine has either to learn this function or to refute it, that is to signal that it is not able to learn it. Three modi of making precise the notion of refuting are considered. We show that the corresponding types of learning refutably are of strictly increasing power, where already the m...

2016
Changshun Zhang Xiaoying Li Long Chen Gaodi Xie Chunlan Liu Sha Pei

We investigated community structure and tree species diversity of six subtropical mountain forests in relation to 11 topographical and edaphic factors in Lower Lancang River Basin, Yunnan Province, China, based on a census of all trees with diameter at breast height≥5 cm in 45 0.06-ha plots. The forests were as follows: a river valley monsoon forest, semi-humid evergreen broad-leaved forest, mo...

Journal: :Gazi Üniversitesi Orman Fakültesi dergisi 2021

Aim of study: The main purpose the study is to determine site factors affecting bird diversity. 
 Area This was performed in Çandır District, Isparta which located inner part Western Mediterranean region.
 Material and methods: In present study, Observations were conducted regularly a total 43 sample sites throughout each month 2016. Also, observed using point-counting techniques from...

Journal: :Nepalese journal of zoology 2023

This study aimed to compare the diversity of birds between protected and non–protected areas that are similar in climatic geographical features. The was carried out three different habitat types (Forest, Agricultural land Wetland Sundarijal Non-protected Changunarayan. Field data were collected using a “Point Count Approach” transects which laid & Wetland). Shannon-Wiener Margalef Diversity...

Journal: :Forests 2022

Species diversity is a crucial index used to evaluate the stability and complexity of forest ecosystems. Studying relationship between stand structure understory herbaceous plants species useful for managers formulate best optimization method with goal improving diversity. In this research, Platycladus orientalis plantations in Beijing were taken as research object. Pearson’s correlation analys...

Journal: :Land 2023

Grasslands in the Altay Mountains are main part of grassland ecosystem Xinjiang, and spatial distribution patterns species diversity biomass have changed significantly due to combined effects climate change anthropogenic disturbances. To clarify point factors on biomass, this study investigated vegetation status 41 sample plots grasslands forest area. The Margalef richness index, Simpson domina...

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