Climate Change Data Portal
DOI | 10.1016/j.ecolmodel.2019.03.007 |
Climate, rather than human disturbance, is the main driver of age-specific mortality trajectories in a tropical tree | |
Gaoue, Orou G.1,2,3; Horvitz, Carol C.4; Steiner, Ulrich K.5,6; Tuljapurkar, Shripad7 | |
发表日期 | 2019 |
ISSN | 0304-3800 |
EISSN | 1872-7026 |
卷号 | 400页码:34-40 |
英文摘要 | Environmental and anthropogenic stressors can interact (e.g., drought, harvest or herbivory) to shape plant demography and evolutionary strategies with implications for sustainable resource management plans. Harvest or recurrent biomass removal can act as a selective force. However, our understanding of how harvest and changes in climate can synergistically shape plant evolutionary strategies is limited. We used age-from-stage matrix modeling to investigate how chronic anthropogenic disturbance (severe foliage and bark harvest) affects age-specific mortality trajectories of a tropical tree, Khaya senegalensis in two contrasting climatic regions (dry versus moist) in West Africa. We then developed a stochastic model to test if changes in disturbance regime and the environmental conditions in which a cohort is born may alter stochastic age-specific mortality rates. The effect of harvest on age-specific mortality trajectories was modest and only noticeable in the moist region. Age-specific mortality trajectories differed significantly between regions. In the moist region, mortality rates decreased with age for the first 30 years of life to a minimum rate and then increased gradually after to reach an old age mortality plateau. In the dry region, mortality rates decreased with age to reach a plateau asymptotically. This difference in age-specific mortality trajectory is due to a greater delay in reaching reproductive size/age in the dry region. Our findings underscore intraspecific variation in age-specific mortality schedules and indicate that climatic effect may override the impact of anthropogenic activities on plant demography. Harvest, by favoring fast life stage transition to reproductive stages, can buffer the effect of drought. |
WOS研究方向 | Environmental Sciences & Ecology |
来源期刊 | ECOLOGICAL MODELLING
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/97950 |
作者单位 | 1.Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN 37996 USA; 2.Univ Parakou, Fac Agron, BP 123, Parakou, Benin; 3.Univ Johannesburg, Dept Geog Environm Management & Energy Studies, APK Campus, Johannesburg, South Africa; 4.Univ Miami, Dept Biol, Coral Gables, FL 33146 USA; 5.Max Planck Odense Ctr Biodemog Aging, Odense, Denmark; 6.Univ Southern Denmark, Dept Biol, Odense, Denmark; 7.Stanford Univ, Dept Biol, Stanford, CA 94305 USA |
推荐引用方式 GB/T 7714 | Gaoue, Orou G.,Horvitz, Carol C.,Steiner, Ulrich K.,et al. Climate, rather than human disturbance, is the main driver of age-specific mortality trajectories in a tropical tree[J],2019,400:34-40. |
APA | Gaoue, Orou G.,Horvitz, Carol C.,Steiner, Ulrich K.,&Tuljapurkar, Shripad.(2019).Climate, rather than human disturbance, is the main driver of age-specific mortality trajectories in a tropical tree.ECOLOGICAL MODELLING,400,34-40. |
MLA | Gaoue, Orou G.,et al."Climate, rather than human disturbance, is the main driver of age-specific mortality trajectories in a tropical tree".ECOLOGICAL MODELLING 400(2019):34-40. |
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