The potential for elevated soil salinity to enhance the ecological trap effect of roadside pollinator habitat
The potential for elevated soil salinity to enhance the ecological trap effect of roadside pollinator habitat
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DOI：
10.1007/s10841-023-00526-3
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发表时间：
2023-10-13
影响因子：
1.9
通讯作者：
Carr，David E.
中科院分区：
文献类型：
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作者：
Lovett，David H.;Carr，David E.
路边栖息地的管理可能是保护日益减少的传粉媒介的重要组成部分，但路边的昆虫死亡率可能很高，形成潜在的“生态陷阱”。冬季使用除冰盐产生的径流会增加路边土壤的盐分，如果这导致花蜜中钠含量升高，可能会增加路边植物对传粉者的吸引力，可能会加剧生态陷阱效应。我们将高速公路中线的土壤盐度与从附近田地收集的土壤进行了比较，并比较了这两个栖息地的常见马利筋（Asclepias syriaca）花蜜中的 Na+ 浓度。我们还操纵了 A 田间种群的土壤盐分。 syriaca 通过添加盐水来记录花蜜 Na+ 和传粉媒介访问的变化。我们发现弗吉尼亚州克拉克县一条高速公路中间的土壤盐度比田间土壤的盐度高 2.3 倍，但来自 A.两个栖息地的 syriacain 的 Na+ 浓度没有显着差异。在田间土壤中添加盐水可使土壤盐分增加 17 倍，并显着增加 Na+inA 的水平。叙利亚卡内塔尔。传粉媒介访问过 A.接受盐水处理的 syriacaumbels 的频率是对照组的两倍。对昆虫保护的影响：我们得出结论，土壤盐度升高能够增加花蜜 Na+ 和 A 的吸引力。 syriacaflower 是昆虫传粉媒介，但我们研究中的路边土壤盐度不足以增强路边植被的生态诱捕效应。
The management of roadside habitat may be an important component of the conservation of declining pollinators, but insect mortality along roadsides can be high, creating a potential “ecological trap.” Runoff from winter applications of deicing salt can increase soil salinity along roadsides, and if this results in higher sodium levels in floral nectar, it could increase the attractiveness of roadside plants to pollinators, possibly accentuating the ecological trap effect. We compared the soil salinity in a highway median to soil collected from nearby fields and compared the Na+concentrations in nectar from common milkweed (Asclepias syriaca) from these two habitats. We also manipulated soil salinity in field populations ofA. syriacaby adding brine solution to document changes in nectar Na+and pollinator visitation. We found that soil salinity in the median of a highway in Clarke County, VA was 2.3 times higher than the salinity of field soil, however nectar fromA. syriacain the two habitats did not differ significantly in Na+concentration. Addition of brine to field soil increased soil salinity 17-fold and significantly increased the level of Na+inA. syriacanectar. Pollinators visitedA. syriacaumbels that received the brine treatment twice as frequently as controls. Implications for insect conservation: We conclude that elevated soil salinity is capable of increasing nectar Na+and the attractiveness ofA. syriacaflowers to insect pollinators, but roadside soil salinity in our study was not high enough to enhance an ecological trap effect of roadside vegetation.