Dominant functional group effects on the invasion resistance at different resource levels.
Dominant functional group effects on the invasion resistance at different resource levels.
复制标题
不同资源水平下优势官能团对入侵抵抗力的影响
DOI：
10.1371/journal.pone.0077220
复制
发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Du ZK
中科院分区：
文献类型：
--
作者：
Wang J;Ge Y;Zhang CB;Bai Y;Du ZK
Background Functional group composition may affect invasion in two ways the effect of abundance, i.e. dominance of functional group; and the effect of traits, i.e. identity of functional groups. However, few studies have focused on the role of abundance of functional group on invasion resistance. Moreover, how resource availability influences the role of the dominant functional group in invasion resistance is even less understood. Methodology/Principal Findings In this experiment, we established experimental pots using four different functional groups (annual grass, perennial grass, deciduous shrub or arbor and evergreen shrub or arbor), and the dominant functional group was manipulated. These experimental pots were respectively constructed at different soil nitrogen levels (control and fertilized). After one year of growth, we added seeds of 20 different species (five species per functional group) to the experimental pots. Fertilization significantly increased the overall invasion success, while dominant functional group had little effect on overall invasion success. When invaders were grouped into functional groups, invaders generally had lower success in pots dominated by the same functional group in the control pots. However, individual invaders of the same functional group exhibited different invasion patterns. Fertilization generally increased success of invaders in pots dominated by the same than by another functional group. However, fertilization led to great differences for individual invaders. Conclusions/Significance The results showed that the dominant functional group, independent of functional group identity, had a significant effect on the composition of invaders. We suggest that the limiting similarity hypothesis may be applicable at the functional group level, and limiting similarity may have a limited role for individual invaders as shown by the inconsistent effects of dominant functional group and fertilization.
Background Functional group composition may affect invasion in two ways the effect of abundance, i.e. dominance of functional group; and the effect of traits, i.e. identity of functional groups. However, few studies have focused on the role of abundance of functional group on invasion resistance. Moreover, how resource availability influences the role of the dominant functional group in invasion resistance is even less understood. Methodology/Principal Findings In this experiment, we established experimental pots using four different functional groups (annual grass, perennial grass, deciduous shrub or arbor and evergreen shrub or arbor), and the dominant functional group was manipulated. These experimental pots were respectively constructed at different soil nitrogen levels (control and fertilized). After one year of growth, we added seeds of 20 different species (five species per functional group) to the experimental pots. Fertilization significantly increased the overall invasion success, while dominant functional group had little effect on overall invasion success. When invaders were grouped into functional groups, invaders generally had lower success in pots dominated by the same functional group in the control pots. However, individual invaders of the same functional group exhibited different invasion patterns. Fertilization generally increased success of invaders in pots dominated by the same than by another functional group. However, fertilization led to great differences for individual invaders. Conclusions/Significance The results showed that the dominant functional group, independent of functional group identity, had a significant effect on the composition of invaders. We suggest that the limiting similarity hypothesis may be applicable at the functional group level, and limiting similarity may have a limited role for individual invaders as shown by the inconsistent effects of dominant functional group and fertilization.
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影响因子：
5.5
作者：
Emery, Sarah M.
通讯作者：
Emery, Sarah M.
DOI：
10.1073/pnas.1033107100
发表时间：
2003-07-22
影响因子：
11.1
作者：
Fargione, J;Brown, CS;Tilman, D
通讯作者：
Tilman, D
影响因子：
5.5
作者：
Byun, Chaeho;de Blois, Sylvie;Brisson, Jacques
通讯作者：
Brisson, Jacques
影响因子：
8.8
作者：
Davis, MA;Pelsor, M
通讯作者：
Pelsor, M
影响因子：
8.8
作者：
Hamilton, MA;Murray, BR;Licari, D
通讯作者：
Licari, D