نتایج جستجو برای: richness margalef index

تعداد نتایج: 415206  

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-...

ژورنال: بوم شناسی آبزیان 2015
Akbarzadeh, Gholamali , Behzadi, Siamak , Darvishi, Mohammad , Salarpouri, Ali ,

The study of spatial and temporal variability of distribution of phytoplankton communities in Northern part of the Persian Gulf (Qeshm andLengeh Islands) was studied. In this study, five groups (47 genera) of phytoplankton include Bacillariophyceae, Dinophyceae, Cyanophyceae, Crysophyceae and Euglenophyceae were identified. The results showed that Diatoms group (79.6 %) and Rhizosolenia genus (...

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...

2015
M. Choudhury

Moth species were studied from some selected districts of Assam (i.e., Cachar and Barpeta district) to determine their diversity index, species richness and evenness of Arctiidae and Geometriidae family of the moth fauna.The moths were collected by applying specialized trapping methods using UV light operating during night. Collected moth species were identified up to family-genusspecies level....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه یزد - دانشکده منابع طبیعی 1392

یکی از مهم ترین عوامل موثر در وقوع آتش سوزی در مناطق خشک، پوشش گیاهی و شرایط آب و هوایی منطقه می باشد. منطقه حفاظت شده باغ شادی یکی از مناطق جنگلی استان یزد بوده که بیش ترین آتش سوزی های استان در آن رخ داده است. به منظور بررسی عوامل موثر بر وقوع آتش سوزی در این منطقه از روش تحلیل سلسله مراتبی (ahp) استفاده شد و معیارهای فیزیوگرافی شامل سه زیرمعیار ارتفاع، شیب و جهت شیب، اقلیم شامل دو زیرمعیار د...

Journal: :International Journal of Tropical Drylands 2023

Abstract. Pramudita DA, Armando MF, Rahmayani D, Afifah FN, Putri NRA, Hartanti AN, Safira RN, Mahajoeno E, Indrawan M, Nazar IA, Buot Jr IE, Setyawan AD. 2023. Species diversity, richness, and conservation status of Pteridophyta in the karst ecosystem Donorejo Forest, Kaligesing, Purworejo, Indonesia. Intl J Trop Drylands 7: 16-25. is often used as an environmental bioindicator. It can be foun...

Journal: :Biodiversitas 2023

Abstract. Rangkuti AB, Hartini KS, Susilowati A, Rambey R, Harahap MM, Arinah H, Irmayanti L, Pamoengkas P, Indriani F, Peniwidiyanti, Ruhidi A. 2023. Structure, composition and diversity of tree species in Martelu Purba Nature Reserve, North Sumatra, Indonesia. Biodiversitas 24: 78-85. Reserve is one the conservation areas Sumatra that functions to protect biodiversity. However, there limited ...

2018
Shuaifeng Li Xuedong Lang Wande Liu Guanglong Ou Hui Xu Jianrong Su

The relationship between biodiversity and biomass is an essential element of the natural ecosystem functioning. Our research aims at assessing the effects of species richness on the aboveground biomass and the ecological driver of this relationship in a primary Pinus kesiya forest. We sampled 112 plots of the primary P. kesiya forests in Yunnan Province. The general linear model and the structu...

Journal: :Journal of Tropical Life Science 2022

Modification and degradation of habitats outside the boundaries a national parkmay result in park's integrity being compromised. Thus, present study aims todocument variation freshwater fish water quality tropical forest streams adjacent to western boundary Kinabalu Park, Sabah. Concurrently, samplesand environmental parameters were collected at six stations covering total streamline length 10 ...

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