Khadijeh Bahalkeh

Khadijeh Bahalkeh
Tarbiat Modares University | TMU · Department of Range Science

Doctor of Philosophy

About

14
Publications
21,154
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561
Citations

Publications

Publications (14)
Article
Full-text available
Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we...
Article
Full-text available
Although the diversity–disturbance relationship has been extensively studied, the differences in responses of taxonomic vs. functional diversity to natural disturbances (i.e., fire) call for an improved understanding of this relationship. Here, we investigated how fire disturbance influenced plant taxonomic and functional diversity in Golestan Nati...
Article
Abstract Questions Are there contrasting short- and long-term effects of shrubs on understorey species that may balance at the community level? (ii) Are these effects due to the responses of different understorey species groups? (iii) Are these effects contributing to community composition? Location An Artemisia steppe community in Golestan Nation...
Preprint
Full-text available
Research in environmental science relies heavily on global climatic grids derived from estimates of air temperature at around 2 meter above ground1-3. These climatic grids however fail to reflect conditions near and below the soil surface, where critical ecosystem functions such as soil carbon storage are controlled and most biodiversity resides4-8...
Article
Question Alpine studies highlighted dominant facilitative effects of cushion species for diversity. Much less studies have assessed the effects of cushion shrubs from drier and less cold mountain habitats and how these effects vary within the shrub canopy and with increasing drought stress with exposure and disturbance by fire. Location A mountain...
Article
Full-text available
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research sp...
Article
Full-text available
The biotic interactions have the strong impact on the ecosystem function. This study aims on the investigation of biotic interactions influenced by shrub death in two exposures. Therefore, 20 alive and 20 dead Onobrychis cornutacushions were selected in each exposure and for each of the plots one plot with the same size in open space were selec...

Questions

Question (1)
Question
Dear Colleagues,
I would like to analyze my data and it would be my pleasure to have your guidance about random effects design. I have three main effect including fire, exposure and positions
-I have two sites with fire (burned and unburned)
-I have selected two exposures in each fire sites (North and South)
-I have selected randomly 25 shrubs in each of them
-I then selected two positions in each shrubs(corner and center).
Plots here are random effects and it would be nice how plots considered as random effects with three main effect including fire, exposure and positions. R code will be very helpful in lme4 or aov.
Regards,
Khadijeh

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Projects

Projects (2)
Project
While gypsum soils seriously limit plant life, they host a highly diversified flora, identified as an international conservation priority. One of the most widespread threats for gypsum ecosystems is overgrazing, particularly in areas with a long grazing tradition like Turkey or Iran. Identifying the mechanisms displayed by plants to survive on gypsum soils and their response to grazing can be crucial to guarantee their conservation, prevent desertification and improve crops in some of the most vulnerable areas of the planet. However, gypsum soils have received little attention in the past and these issues remain largely unknown. This project seeks to shed light on these important issues by: running a global analysis of the chemical composition of plants growing on gypsum, including 84 gypsum species from Iran and Turkey; Identifying sustainable livestock grazing pressures for gypsum ecosystems in Spain, Iran and Turkey; Fostering the development of ecological research lines on gypsum ecosystems in Turkey and Iran and creating long-lasting scientific capacities within foreign participant research groups and their institutions for the study of gypsum ecology. This will ultimately strengthen the ecological knowledge on gypsum ecosystems in both countries, contributing to their conservation and management. this project is founded by CSIC.
Project
The aim of this project is to study the effect of fire and climate change on vegetation in arid and semi arid zone of Iran. We investigate the biotic interactions of dominant shrubs in Golestan national park. We also investigate the functional response of species and microclimate changes in our study area.