Vegetation, Floristic Diversity, and Size-Classes ofAcacia gerrardiiin an Arid Wadi Ecosystem

物种丰富度 植被(病理学) 生态学 阿拉伯树胶 物种均匀度 人口 排序 物种多样性 生物 地理 农学 人口学 社会学 医学 病理
作者
Abdulrahman A. Alatar,Mohamed A. R. El-Sheikh,Jacob Thomas,Ahmad K. Hegazy,Hosam A. El Adawy
出处
期刊:Arid Land Research and Management [Informa]
卷期号:29 (3): 335-359 被引量:8
标识
DOI:10.1080/15324982.2014.968692
摘要

AbstractThis study focuses on the vegetation ecology, floristic diversity, and dynamics of Acacia gerrardii populations in wadi Huraimla, Central Saudi Arabia. The floristic richness, plant cover, human impact, and demography of A. gerrardii population were monitored in open grazing and managed sites. The applications of TWINSPAN, DCA, and CCA multivariate analysis have produced nine vegetation groups; eight of them were associated with the distribution of A. gerrardii and one group with the surrounding agricultural lands. The plant communities were separated into three major vegetation groups, viz., Acacia gerrardii-Rhazya stricta representing the open grazing sites, Acacia gerrardii-Lycium shawii-Zilla spinosa representing the managed sites, and Cynodon dactylon-Heliotropium bacciferum-Cenchrus ciliaris dominating the agricultural lands. The CCA ordination indicated that the separation of plant species along the first axis was positively affected by EC, K, Na, species richness and human impact, and negatively affected by pH, Mg, and density and age of A. gerrardii populations. Alternatively, the second axis is positively correlated with altitude and Ca content of the soil. Human impact is positively correlated with soil salinity, K and Na contents and negatively correlated with altitude, soil texture, and Mg content. The density of A. gerrardii is positively correlated with pH, Fe, Mn, and Mg contents of the soil, whereas negatively correlated with salinity and K and Na contents, species richness, relative evenness, and human impact. Populations of A. gerrardii demonstrated different size-class distribution patterns with either continuous regeneration inputs or lack of regeneration.Keywords: chorotypescommunity classificationgrazinglife formsNajd plateauphytogeographySaudi Arabiaspecies richness AcknowledgementsThe authors are highly indebted to the authorities at the study area represented by Sheikh Abdullah Al-Sheddy for logistic support and facilities offered during the field work.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
Muller完成签到,获得积分10
刚刚
1秒前
amber发布了新的文献求助10
1秒前
小鱼发布了新的文献求助10
2秒前
4秒前
好好发布了新的文献求助10
4秒前
zsl0207发布了新的文献求助10
7秒前
汪礼艳完成签到,获得积分10
7秒前
7秒前
9秒前
淡然觅荷完成签到 ,获得积分10
9秒前
李爱国应助一碗冷的粥采纳,获得10
10秒前
有足量NaCl发布了新的文献求助10
10秒前
10秒前
13秒前
康园完成签到 ,获得积分10
16秒前
少女闰土完成签到,获得积分10
17秒前
18秒前
19秒前
Muller发布了新的文献求助10
19秒前
zhao完成签到 ,获得积分10
21秒前
21秒前
ouyang发布了新的文献求助10
22秒前
Akim应助物理少男小方采纳,获得10
22秒前
西早发布了新的文献求助10
22秒前
少女闰土发布了新的文献求助10
23秒前
HRBJ完成签到,获得积分10
23秒前
wang完成签到 ,获得积分10
24秒前
24秒前
小老虎的妈妈完成签到 ,获得积分10
26秒前
参苓白术扁豆陈完成签到,获得积分10
27秒前
zv关注了科研通微信公众号
27秒前
28秒前
Cruffin完成签到 ,获得积分10
31秒前
dreamer完成签到 ,获得积分10
31秒前
lihan123完成签到 ,获得积分10
32秒前
AI完成签到,获得积分10
32秒前
32秒前
ding应助西早采纳,获得10
34秒前
青岩发布了新的文献求助10
35秒前
高分求助中
Solution Manual for Strategic Compensation A Human Resource Management Approach 1200
Natural History of Mantodea 螳螂的自然史 1000
Glucuronolactone Market Outlook Report: Industry Size, Competition, Trends and Growth Opportunities by Region, YoY Forecasts from 2024 to 2031 800
A Photographic Guide to Mantis of China 常见螳螂野外识别手册 800
Zeitschrift für Orient-Archäologie 500
Autoregulatory progressive resistance exercise: linear versus a velocity-based flexible model 500
Synchrotron X-Ray Methods in Clay Science 300
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 细胞生物学 免疫学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3340299
求助须知:如何正确求助?哪些是违规求助? 2968347
关于积分的说明 8633293
捐赠科研通 2647882
什么是DOI,文献DOI怎么找? 1449877
科研通“疑难数据库(出版商)”最低求助积分说明 671549
邀请新用户注册赠送积分活动 660574