SPECIES RESPONSES OF CARABID BEETLES (COLEOPTERA, CARABIDAE) DURING POSTFIRE REGENERATION OF BOREAL FOREST
SPECIES RESPONSES OF CARABID BEETLES (COLEOPTERA, CARABIDAE) DURING POSTFIRE REGENERATION OF BOREAL FOREST
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DOI：
10.4039/ent1231369-6
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发表时间：
1991-11-01
影响因子：
0.9
通讯作者：
HOLLIDAY, NJ
中科院分区：
文献类型：
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作者：
HOLLIDAY, NJ
从马尼托巴省因特莱克地区发生严重森林火灾一年后开始，通过陷阱诱捕法在两个烧毁地点和两个未烧毁对照地点对步甲甲虫进行了采样。火灾发生前，一处烧毁地点主要种植白杨、山杨，另一处烧毁地点主要种植针叶树（主要是云杉属植物）。在为期 11 年的研究中，烧毁的地点主要是白杨树苗。在烧毁地点捕获三种步甲的频率明显高于对照地点。其中两种，Harpalus laticeps LeConte 和 H.egregius Casey，在火灾发生后不久就入侵了，并在火灾发生后的几年里被困在烧毁的地方。与对照地点相比，在烧毁地点捕获的 17 种物种明显减少；另外 13 种常见物种的捕获量并未因该地点的燃烧而受到显着影响。燃烧影响了 Carabus taedatus F. 和 Pterostichus adstrictus Eschscholtz 捕获量的季节性模式；这是由于烧毁地点的垃圾和土壤温度较高。其他常见物种的季节模式并未受到燃烧的显着影响。在烧毁地点，短翅类物种的发生率和甲虫的大小随着火灾发生后的时间而增加。在对照地点，短翅类的发生率与时间无关，但针叶树地点的短翅类物种的百分比显着高于白杨地点。如果早期殖民者是超级流浪者 R 战略家，而后来的入侵者是 K 战略家，则短翅和大小的趋势是预期的。森林再生过程中物种的出现模式可以用扩散和竞争能力、对栖息地物理属性的偏好以及对猎物可用性的反应来解释。
Beginning 1 year after an intense forest fire in the Interlake region of Manitoba, carabid beetles were sampled by pitfall trapping in two burned sites and two unburned control sites. Before the fire, one burned site had been dominated by aspen, Populus tremuloides Michx., and the other by conifers (mostly Picea spp.). During the 11-year study, burned sites became dominated by aspen saplings. Three carabid species were caught significantly more frequently in burned sites than in control sites. Two of these, Harpalus laticeps LeConte and H. egregius Casey, invaded soon after the fire and were caught in the burned sites for several years after the fire. Seventeen species were caught significantly less often in burned than in control sites; catches of another 13 common species were not significantly affected by burning of the site. Burning influenced the seasonal patterns of catches of Carabus taedatus F. and Pterostichus adstrictus Eschscholtz; this was attributed to higher litter and soil temperatures in burned sites. Seasonal patterns of other common species were not markedly affected by burning. In burned sites, the incidence of brachypterous species and the size of beetles increased with time after the fire. In control sites, the incidence of brachyptery was independent of time, but the percentage of brachypterous species was significantly higher in the conifer site than in the aspen site. Trends of brachyptery and size are those expected if early colonizers are super-tramp r-strategists and later invaders are K-strategists. Patterns of species occurrence during forest regeneration can be explained in terms of dispersal and competitive abilities, preference for physical attributes of the habitat, and responses to prey availability.