Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 1438-3896 |
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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