نتایج جستجو برای: temporal diversity

تعداد نتایج: 426873  

The diversity and distribution of the rotifers family Notommatidae was studied in the northwest, the south and the southwest of Iran. In total, 29 species were identified, of which, 25 are new records for the country. New records include the following species: Cephalodella forficata, C. cf. mus, C. vittata, C. ventripes, C. lepida, C. inquilina, C. gibboides, C. tincaformis , C. obvia, C. stere...

Journal: :IJISP 2008
Tamas S. Gal Zhiyuan Chen Aryya Gangopadhyay

The identity of patients must be protected when patient data are shared. The two most commonly used models to protect identity of patients are L-diversity and K-anonymity. However, existing work mainly considers data sets with a single sensitive attribute, while patient data often contain multiple sensitive attributes (e.g., diagnosis and treatment). This article shows that although the K-anony...

Journal: :Science 2014
Maria Dornelas Nicholas J Gotelli Brian McGill Hideyasu Shimadzu Faye Moyes Caya Sievers Anne E Magurran

The extent to which biodiversity change in local assemblages contributes to global biodiversity loss is poorly understood. We analyzed 100 time series from biomes across Earth to ask how diversity within assemblages is changing through time. We quantified patterns of temporal α diversity, measured as change in local diversity, and temporal β diversity, measured as change in community compositio...

Journal: :Ecology 2013
Stephen M Hatosy Jennifer B H Martiny Rohan Sachdeva Joshua Steele Jed A Fuhrman Adam C Martiny

Factors controlling the spatial distribution of bacterial diversity have been intensely studied, whereas less is known about temporal changes. To address this, we tested whether the mechanisms that underlie bacterial temporal beta-diversity vary across different scales in three marine microbial communities. While seasonal turnover was detected, at least 73% of the community variation occurred a...

2001
Dhananjay Gore Sumeet Sandhu Arogyaswami Paulraj

Introduction: There is increasing interest [1], [2], [3], [4] in space-time coding for multiple input multiple output (MIMO) frequency selective wireless channels. This paper addresses space-time code design for such channels from a single carrier perspective. We derive code construction criterion for exploiting full spatio-temporal diversity in the channel. We analyze the delay diversity code ...

Journal: :caspian journal of environmental sciences 2010
r. malekzadeh viayeh

the diversity and distribution of the rotifers family notommatidae was studied in the northwest, the south and the southwest of iran. in total, 29 species were identified, of which, 25 are new records for the country. new records include the following species: cephalodella forficata, c. cf. mus, c. vittata, c. ventripes, c. lepida, c. inquilina, c. gibboides, c. tincaformis , c. obvia, c. stere...

2015
Maryam Yazdani Foshtomi Ulrike Braeckman Sofie Derycke Melanie Sapp Dirk Van Gansbeke Koen Sabbe Anne Willems Magda Vincx Jan Vanaverbeke Yiguo Hong

OBJECTIVES The marine benthic nitrogen cycle is affected by both the presence and activity of macrofauna and the diversity of N-cycling microbes. However, integrated research simultaneously investigating macrofauna, microbes and N-cycling is lacking. We investigated spatio-temporal patterns in microbial community composition and diversity, macrofaunal abundance and their sediment reworking acti...

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