Fine-scale spatial genetic structure of common and declining bumble bees across an agricultural landscape.
Fine-scale spatial genetic structure of common and declining bumble bees across an agricultural landscape.
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DOI：
10.1111/mec.12823
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发表时间：
2014-07
影响因子：
4.9
通讯作者：
Carvell C
中科院分区：
文献类型：
--
作者：
Dreier S;Redhead JW;Warren IA;Bourke AF;Heard MS;Jordan WC;Sumner S;Wang J;Carvell C
土地利用的变化威胁到了许多昆虫传粉者的数量，包括大黄蜂。扩散模式和基因流动是物种响应土地利用变化能力的关键决定因素，但在熊蜂身上进行的精细规模(10公里)研究很少。利用微卫星标记技术，对英国英格兰南部农业景观中常见的4种熊蜂(B.terrestris、B.lapidarius、B.pascuorum和B.hortorum)和1个衰退种(B.ruderatus)种群的精细空间遗传结构进行了测定。研究景观包括播种的花斑，代表传粉者的农业环境选择。我们发现，不出所料，鲁氏杆菌种群具有相对较低的杂合度、等位基因数和群体密度。在所有物种中，近亲繁殖不存在或存在，但很弱(FIS=0.01-0.02)。利用从工蚁同胞关系和根据这些同胞关系中工蚁位置估计的蜂群位置重建的皇后基因型别，我们发现在拉皮达里乌斯、霍托勒姆和鲁德拉图斯中没有明显的距离隔离。在B.terrestris和B.pascuorum中，它是存在的，但很弱；例如，在这两个物种中，相隔1米的女王创始群体的预期亲缘关系为0.02。这些结果表明，大黄蜂种群在精细空间尺度上表现出低水平的空间遗传结构，最可能的原因是通过广泛的女王扩散进行的基因流动。此外，研究结果表明，农业环境计划保护措施有潜力通过在景观中创造更均匀的适宜栖息地分布来促进精细的基因流动。
Land-use changes have threatened populations of many insect pollinators, including bumble bees. Patterns of dispersal and gene flow are key determinants of species' ability to respond to land-use change, but have been little investigated at a fine scale (<10 km) in bumble bees. Using microsatellite markers, we determined the fine-scale spatial genetic structure of populations of four common Bombus species (B. terrestris, B. lapidarius, B. pascuorum and B. hortorum) and one declining species (B. ruderatus) in an agricultural landscape in Southern England, UK. The study landscape contained sown flower patches representing agri-environment options for pollinators. We found that, as expected, the B. ruderatus population was characterized by relatively low heterozygosity, number of alleles and colony density. Across all species, inbreeding was absent or present but weak (FIS = 0.01–0.02). Using queen genotypes reconstructed from worker sibships and colony locations estimated from the positions of workers within these sibships, we found that significant isolation by distance was absent in B. lapidarius, B. hortorum and B. ruderatus. In B. terrestris and B. pascuorum, it was present but weak; for example, in these two species, expected relatedness of queens founding colonies 1 m apart was 0.02. These results show that bumble bee populations exhibit low levels of spatial genetic structure at fine spatial scales, most likely because of ongoing gene flow via widespread queen dispersal. In addition, the results demonstrate the potential for agri-environment scheme conservation measures to facilitate fine-scale gene flow by creating a more even distribution of suitable habitats across landscapes.
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影响因子：
2.2
作者：
Goulson, D.;Kaden, J. C.;Darvill, B.
通讯作者：
Darvill, B.
影响因子：
4.9
作者：
Estoup, A;Solignac, M;Scholl, A
通讯作者：
Scholl, A
DOI：
10.1098/rstb.1997.0179
发表时间：
1997-12-29
期刊：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子：
--
作者：
Bourke, AFG
通讯作者：
Bourke, AFG
影响因子：
4.9
作者：
Darvill, B;Ellis, JS;Goulson, D
通讯作者：
Goulson, D
影响因子：
4.9
作者：
Darvill, B.;Lepais, O.;Goulson, D.
通讯作者：
Goulson, D.