Negar AhmadianTarbiat Modares University | TMU · Department of Range Science
Negar Ahmadian
Ph.D Student
About
13
Publications
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Citations
Publications
Publications (13)
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...
In this study, we aim to evaluate the diversity of vascular plants and lichens coexisting in Artemisia sieberi dominated landscapes of northern Iran. Specifically, we wanted to unveil to what extent Artemisia plant cover and soil features affected species diversity and composition of annuals and lichens growing beneath them, and if annual plants an...
Biological soil crusts (BSC) play a crucial role in arid ecosystem functioning, yet the effect of their properties (e.g. whether they are dominated by mosses and lichens) on the germination has rarely been investigated. Here, we analysed the effects of intact, dead and removed moss or lichen BSC on seed germination of Stipa caucasica, a key species...
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...
A water-soluble polysaccharide was isolated from Tornabea scutellifera and fractionated using a DAEA Sepharose FF column to evaluate its capacity to stimulate natural killer (NK) cells and macrophages. Neutral sugars (71.8–93.5%) constituted the major part of crude polysaccharides and fractions (TSF 1 and TSF 2 ) with relatively lower levels of pro...
Abstract
1- INTRODUCTION
Soil erosion is one of the most destructive processes of arid and semi-arid areas, which
leads to desertification in a large area of the region. In windy areas, the wind in the region
increases the probability of wind erosion. Soil moisture and soil temperature are the two
effective factors in soil erosion control. Vegetati...
Abstract
Biological soil crusts greatly affect the surface properties of the soil, which in turn may also
alter the germination of the seeds of vascular plants. The aim of this study was to investigate the
effect of moss on germination of five dominant species of Golestan National Park. At the
beginning of the experiment, the seeds of five dominant...
Patchy vegetation is the main characteristic of arid and semi-arid lands. Gaps between patches in some cases are covered with biological soil crust such as lichens and these crusts have important ecological roles such as influence on germination and plant survival. In this research, effects of lichens as an important biological crust on the germina...
Questions
Question (1)
It would be my pleasure to have your advice for instruments and facilities in plant ecophysiology lab. We are working mainly on wild species from rangelands and forests in aridlands. Some photosynthsis, anzymes and leaf chemical physiological traits would be favorate parameters. It would be nice if you intrdouce the model of instruments as well.
Warm regards, Negar
Projects
Projects (2)
- Influence of BSC on seed germination and species establishment
- BSc and soil seed bank potential in rangeland restoration
- Lichen functional diversity in arid steppes
- Microlimate modifications by BSC
- Soil quality variations in lichens, moss and cyanobacters crust
- Interactions of Artemisia shrubs and moss
Goal:
1- Diversity of habitats in connection to Biological Soil Crust of Iranian arid and semi arid environments
2- Taxonomic composition and species diverse in connection to BSC itself.
3- BSC value in connection to biological indicators of soil health
4- Biological soil crusts structure function and management
5 -Bioindicator Species in BSCs composition and their use in biomonitoring of Iranian Rangelands
6-Biological soil crusts as indicator of overgrazing
7-Biological Soil Crusts and Wind Erosion
8-Biological soil crusts of Iran: their diversity, functional ecology and management
