Year-to-year variation in carabid beetle (Coleoptera, Carabidae) assemblages on the Aland Islands, south-west Finland
Year-to-year variation in carabid beetle (Coleoptera, Carabidae) assemblages on the Aland Islands, south-west Finland
复制标题
DOI：
10.1046/j.1365-2699.2002.00681.x
复制
发表时间：
2002-03-01
影响因子：
3.9
通讯作者：
Niemelä, J
中科院分区：
文献类型：
--
作者：
Kotze, DJ;Niemelä, J
目的（1）研究1982 - 1999年期间英国安斯特罗姆兰岛主岛及其附近5个小岛步甲群落结构的变化。(2)确定一年观察到的岛屿差异是否反映在另一年。(3)研究自1982年以来这些岛屿上个别步甲物种丰度水平的变化。(4)比较Angstromland主岛与小岛上不会飞物种的比例。位置芬兰波罗的海岛屿; Angstromland主岛（90，000公顷）和附近的五个小岛（8-29公顷）。方法在4年内（1982年、1987年、1988年和1999年）使用陷阱收集步甲。采样在潮湿、云杉为主、郁郁葱葱的森林斑块中进行。结果总共收集了12，127只步甲，代表46种步甲;安斯特朗兰主岛有41种（8580只），小岛上有31种（3547只）。步甲组合结构，使用排序技术测量，是一贯的和显着不同的主岛和小岛的网站。步甲组合结构和个别物种的丰度确实发生了显着变化，可能是因为在Angstromland群岛的气候和栖息地的变化相结合。在小岛上收集到的六种最丰富的物种，以及三种最丰富的物种，都是短翅的。此外，小岛屿有较高的比例和数量的短翅物种相比，主要岛屿的Angstromland.Main结论步甲组合结构显着不同的主要岛屿和小岛屿之间的所有年份的采样，表明单年的研究足以证明在波罗的海岛屿步甲组合的差异。小岛屿上有一个非随机比例的物种池，可在Angstromland主岛和芬兰大陆上找到。看来，分散到波罗的海的岛屿是很容易的步甲的所有翅膀形式，但短翅物种是更成功的殖民者。
Aims (1) To investigate changes in structure of carabid assemblages between sites on the main island of Angstromland and five small nearby islands between 1982 and 1999. (2) To determine whether island differences observed in one year is mirrored in another one. (3) To examine changes in abundance levels of individual carabid species on these islands since 1982. (4) To compare the proportion of flightless species on the main island of Angstromland with those on the small islands.Location Islands in the Baltic Sea, Finland; the main island of Angstromland (90,000 ha) and five small, nearby islands (8-29 ha).Methods Carabid beetles were collected, using pitfall traps, during 4 years (1982, 1987, 1988 and 1999). Sampling took place in moist, spruce-dominated, lush forest patches.Results Overall, 12,127 individuals representing forty-six carabid species were collected; forty-one species (8580 individuals) on the main island of Angstromland, and thirty-one species (3547 individuals) on the small islands. Carabid assemblage structure, measured using ordination techniques, was consistently and significantly different between the main island and the small island sites. Carabid assemblage structure and abundances of individual species did change significantly between years, possibly because of a combination of climatological and habitat changes in the Angstromland archipelago. The six most abundant species collected on the small islands, and the three most abundant species overall, were all short-winged. Furthermore, the small islands had a higher proportion and number of short-winged species compared with the main island of Angstromland.Main conclusions Carabid assemblage structure was significantly different between the main island and the small islands in all years sampled, indicating that single-year studies are sufficient to demonstrate differences in carabid assemblages on Baltic islands. Small islands host a non-random proportion of species pools available on the main island of Angstromland and mainland Finland. It appears that dispersal to islands in the Baltic Sea is easy for carabid beetles of all wing forms, but that short-winged species are more successful colonizers.