نتایج جستجو برای: and evenness e

تعداد نتایج: 17333637  

Journal: :International Journal of Approximate Reasoning 2017

2015
Dong Su Yu Seung Hwa Yoo

Biological diversity, also known as biodiversity, is an important criterion for measuring the value of an ecosystem. As biodiversity is closely related to human welfare and quality of life, many efforts to restore and maintain the biodiversity of species have been made by government agencies and non-governmental organizations, thereby drawing a substantial amount of international attention. In ...

2007
DeEtta K. Mills James A. Entry Joshua D. Voss Patrick M. Gillevet Kalai Mathee

Amplicon length heterogeneity PCR (LH-PCR) was investigated for its ability to distinguish between microbial community patterns from the same soil type under different land management practices. Natural sagebrush and irrigated mouldboard-ploughed soils from Idaho were queried as to which hypervariable domains, or combinations of 16S rRNA gene domains, were the best molecular markers. Using stan...

Journal: :Indian journal of entomology 2022

This study examined the diversity, abundance and evenness of butterfly pollinators in Kumaun region, Uttarakhand from March 2019 to February 2020. A total 394 butterflies, representing 40 species five families were collected. Nymphalidae was most dominant family with 19 species, followed by Pieridae (9 species), Lycaenidae Papilionidae (2 Hesperiidae (1 respectively. Pieris canidia indica (Evan...

2008
S. NAYAK

The influence of soil pH was evaluated on the abundance and generic diversity of cyanobacteria in soil samples collected from diverse rice soil ecologies of India. Qualitative and quantitative studies of the 52 soil samples collected from nine agroecologies was carried out using enrichment, MPN (Most Probable Number) techniques and diversity indices were measured. A total of 166 forms, includin...

2007
Karen R. Hickman Justin D. Derner

We studied short-term (1–3 years) responses of plant species and functional group abundances, richness, evenness, diversity, and similarity following cessation of 25 years (1972–1997) of herbicide application in a remnant of Blackland Tallgrass Prairie in central Texas. Substantial increases in plant cover from 1998 to 2000 were observed for annual forbs (359%–900%), primarily attributable to f...

2015
Junjuan Li Baoqi Zuo Chen Wang Wenxiao Tu

In this paper, a new yarn evenness measurement method based on machine vision is introduced, which is a direct measurement process, as opposed to other methods. Two types of yarns (i.e., same yarn count but different quality grade and same quality grade but different yarn count) are measured to determine the coefficient of variation unevenness, which can be compared with the results of USTER ME...

Journal: :Jurnal Biodjati 2021

Indonesia is a megadiverse country. Butterflies become one of the Indonesian diversities. has second-highest butterfly species in world with more than 2000 species. Flower plants are used by butterflies as hostplants and foodplant. The aims this research were to know butterflies’ diversity food Mount Muria at Kudus City, Central Java. quadran sampling transect method three stations (along 2 km)...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم کشاورزی 1393

بررسی فونستیک کنه¬های پیش¬استیگما prostigmata)) باغ¬های زیتون استان گیلان طی سال¬های 1392-1391 انجام شد. کنه¬ها از نمونه¬های اندام¬های گیاهی، خاک و علف¬های هرز جداسازی شدند. سپس کنه¬ها به¬وسیله محلول نسبیت شفاف¬ و در محیط هویر از آن¬ها اسلاید میکروسکوپی تهیه شد. در مجموع، 28 گونه متعلق به 21 جنس و 14 خانواده شناسایی شدند. از این میان 5 جنس و 10 گونه برای استان گیلان و 1 گونه برای دنیا جدید می¬ب...

ژورنال: مرتع 2020
Abbasi, Masoomeh, Bidar, Mahmood, Ghorbani, Ardavan, Moameri, Mehdi, Samadi, Sahar,

Presence of invasive species on rangelands is a degradation sign. The aim of this study was to evaluate the effects of invasive species Leucanthemum vulgare Lam. on the structural and functional characteristics of Fandoghlou rangelands in the Namin county of Ardabil province. The model used for sampling was the stratified random systematic. Two main sites with the presence and absence of L. vul...

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