Arid
DOI10.1007/s10144-012-0307-8
Ruderality in extreme-desert cacti? Population effects of chronic anthropogenic disturbance on Echinocereus lindsayi
Martorell, Carlos2; Garcillan, Pedro P.1; Casillas, Francisco3
通讯作者Garcillan, Pedro P.
来源期刊POPULATION ECOLOGY
ISSN1438-3896
出版年2012
卷号54期号:2页码:335-346
英文摘要

Ruderal species, i.e., those that increase their numbers in the presence of disturbance, are not expected to occur in extreme environments. We test whether Echinocereus lindsayi, a cactus from an extreme desert, follows the ruderal trend observed in similar species from mild deserts, or, as theory suggests, it is a non ruderal. Contrary to expectations, its density and fraction of small individuals in the population increased with disturbance. This seemingly results from increased establishment, as it is nursed by rocks exposed by disturbance. A demographic model for two populations, one nearly pristine and another highly disturbed, showed that at the latter site recruitment was more frequent and likely. At the disturbed site the performance of E. lindsayi individuals was usually poor, except on favorable years. Then, competition release caused by disturbance apparently allowed for a better performance compared to the less disturbed site. Despite that this opportunistic behavior would suffice to maintain the population size stable, the large mortality produced by an insect outbreak in two of the four study years caused the population to diminish. In contrast, the population at the less disturbed site was near equilibrium. If the insect outbreak is associated to disturbance, E. lindsayi at the disturbed site would be already experiencing more disturbance than it tolerates. This agrees with the fact that no populations were found at greater disturbance intensities. While, contrary to our hypothesis, E. lindsayi is ruderal, this extreme desert species appears to tolerate far less disturbance than its counterparts from milder areas.


英文关键词Cactaceae Conservation Grazing Integral projection models Population dynamics Stressful environments
类型Article
语种英语
国家Mexico
收录类别SCI-E
WOS记录号WOS:000302284300010
WOS关键词MAMMILLARIA-PECTINIFERA ; CHIHUAHUAN DESERT ; SONORAN DESERT ; RESOURCE AVAILABILITY ; CLIMATIC VARIABILITY ; SEMIARID ECOSYSTEMS ; PLANT-COMMUNITIES ; RESPONSE ANALYSIS ; PERENNIAL PLANTS ; BAJA-CALIFORNIA
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构Universidad Nacional Autónoma de México
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174604
作者单位1.Ctr Invest Biol Noroeste CIBNOR, La Paz 23090, Baja California, Mexico;
2.Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Mexico City 04510, DF, Mexico;
3.Univ Autonoma Baja California, Fac Ciencias, Ensenada 22830, Baja California, Mexico
推荐引用方式
GB/T 7714
Martorell, Carlos,Garcillan, Pedro P.,Casillas, Francisco. Ruderality in extreme-desert cacti? Population effects of chronic anthropogenic disturbance on Echinocereus lindsayi[J]. Universidad Nacional Autónoma de México,2012,54(2):335-346.
APA Martorell, Carlos,Garcillan, Pedro P.,&Casillas, Francisco.(2012).Ruderality in extreme-desert cacti? Population effects of chronic anthropogenic disturbance on Echinocereus lindsayi.POPULATION ECOLOGY,54(2),335-346.
MLA Martorell, Carlos,et al."Ruderality in extreme-desert cacti? Population effects of chronic anthropogenic disturbance on Echinocereus lindsayi".POPULATION ECOLOGY 54.2(2012):335-346.
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