نتایج جستجو برای: ecological indices

تعداد نتایج: 181372  

2015
YAO Xia

A knowledge model with temporal and spatial characteristics for the quantitative design of a cultural pattern in wheat production, using systems analysis and dynamic modeling techniques, was developed for wheat management, as a decision-making tool in digital farming. The fundamental relationships and algorithms of wheat growth indices and management criteria to cultivars, ecological environmen...

Nowadays, the risk of degradation of wetlands is one of the main environmental challenges in the world, so continuous and long-term monitoring of ecological changes in wetlands can play a key role in their protection and proper management. In the present study, the trend of monthly changes in some of the most important ecological indicators of the aquatic environment of Shadegan wetland includi...

2014
CARLOS ANTONIO COSTA DOS SANTOS

The main objective of this study is to provide information on trends, in local scale, using records of daily temperature and precipitation of a single weather station in an ecological reserve of the savanna biome in Federal District/Brazil, analyzing different extreme climatic indices. The extreme temperature indices have identified that the days are getting warmer and the nights are cooler at ...

2016
GEORGE LIVINGSTON BONNIE WARING LUIS F. PACHECO DAMAYANTI BUCHORI YUEXIN JIANG

Currently, countries with the highest human development index (HDI) dominate the production of ecological research. This is problematic because ecology is a discipline that is highly relevant to the challenges facing countries with lower indices. We characterize the full state of current inequity at the authorship and editorial levels, investigating the relative role of gross domestic product (...

Journal: :Journal of clinical and experimental neuropsychology 2013
Gustavo Cuberos-Urbano Alfonso Caracuel Raquel Vilar-López Carlos Valls-Serrano Andrew Bateman Antonio Verdejo-García

The"dysexecutive syndrome" is composed of a range of cognitive, emotional, and behavioral deficits that are difficult to evaluate using traditional neuropsychological tests. The Multiple Errands Test (MET) was originally developed to systematize the assessment of the more elusive manifestations of the dysexecutive syndrome. The aims of this study were to examining the reliability of the MET and...

Journal: :حفاظت گیاهان 0
زهره خسرویان چترودی حسین صادقی نامقی مجتبی حسینی

pollination and pest control are perhaps the best-known ecological services performed by hover flies. the species diversity and their abundance have an influential impact on the ecological services provided by this family. to find out species diversity of adult flower flies associated with agroecosystems in kerman province, a biodiversity survey using insect net and color water traps was conduc...

Journal: :Marine pollution bulletin 2009
Michael Williams Ben Longstaff Claire Buchanan Roberto Llansó William Dennison

In an effort to better portray changing health conditions in Chesapeake Bay and support restoration efforts, a Bay Health Index (BHI) was developed to assess the ecological effects of nutrient and sediment loading on 15 regions of the estuary. Three water quality and three biological measures were combined to formulate the BHI. Water quality measures of chlorophyll-a, dissolved oxygen, and Secc...

Journal: :مدیریت خاک و تولید پایدار 0
شمس الله ایوبی دانشکده کشاورزی، دانشگاه صنعتی اصفهان فریده عباس زاده گروه خاکشناسی- دانشگاه صنعتی اصفهان اعظم جعفری دانشگاه باهنر کرمان حسین خادمی گروه خاکش ناسی دانشگاه صنعتی اصفهان

knowledge about spatial soil variation in terms of measured pedodiversity offers the possibility to estimate the quality and variance within a soil map. diversity indices and abundance distribution models are statistical tools which ecologists have applied for decades for analyzing the intrinsic regularities of various ecological entities. in this study relationships between soils evolution, la...

2013
Yuri Kimura Louis L. Jacobs Thure E. Cerling Kevin T. Uno Kurt M. Ferguson Lawrence J. Flynn Rajeev Patnaik

Stable carbon isotope analysis in tooth enamel is a well-established approach to infer C3 and C4 dietary composition in fossil mammals. The bulk of past work has been conducted on large herbivorous mammals. One important finding is that their dietary habits of fossil large mammals track the late Miocene ecological shift from C3 forest and woodland to C4 savannah. However, few studies on carbon ...

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