Timing of oviposition influences the effects of a non-native grass on amphibian development
Timing of oviposition influences the effects of a non-native grass on amphibian development
复制标题
产卵时间影响外来草对两栖动物发育的影响
DOI：
10.1007/s00442-020-04744-3
复制
发表时间：
2020
期刊：
影响因子：
2.7
通讯作者：
Willson, John D.
中科院分区：
文献类型：
--
作者：
Kross, Chelsea S.;Dodd, Allyn K.;Mariage, Philip L.;Willson, John D.
土地利用的变化可以通过改变构成水生系统内营养基础的补贴来改变水生系统中的能量动态。然而，对补贴变化的实验评估往往没有考虑到影响，如个体生长和存活的差异，在田间经历的不同生态环境下可能会有什么不同。我们使用中观方法来研究湿地周围的凋落物(本地草原或非本地高羊茅草)和产卵时间对幼虫两栖动物发育的影响。我们发现，在早期产卵的处理中，不同的窝类型的存活是不同的，在羊茅处理中，死亡率接近100%。反之，产卵后期不同类型幼虫的存活率相似(~ 43%)，羊茅后期幼虫的变态更快，变态后的幼虫比草原处理的幼虫大。后续实验证实，低溶解氧(DO)是高羊茅早期处理死亡率高的原因；高羊茅导致微生物水华，使DO降至 <； 2 mg/L数天，导致孵化成功率低。在补充曝气的处理中，这种影响被消除。最后，我们证实了在野外也出现了实验观察到的DO模式。环境(即相对于两栖动物繁殖的淹没时间)对于理解补贴对两栖动物种群的影响至关重要；早期和爆炸性繁殖的物种可能会因为耗尽而经历灾难性的死亡；而繁殖较晚的物种可能会经历更强的新兵适应能力。考虑非本土物种在不同生态环境中的影响对于阐明其影响的程度是必要的。
Land-use change can alter the energy dynamics in aquatic systems by changing the subsidies that form the nutrient base within them. However, experimental evaluations of subsidy change often fail to consider how effects, such as differences in individual growth and survival, may differ under varying ecological contexts experienced in the field. We used a mesocosm approach to investigate how litter (Native Prairie or Non-Native Tall-Fescue Grass) surrounding wetlands and timing of oviposition affected larval amphibian development. We found that survival differed between litter types in the Early-Oviposition treatment, with nearly 100% mortality in Fescue treatments. Conversely, survival was similar across litter types in the Late Oviposition treatment (~ 43%), and larvae in Late-Fescue treatments metamorphosed more quickly and were larger post-metamorphosis than larvae in Prairie treatments. Follow-up experiments confirmed that low dissolved oxygen (DO) was responsible for high mortality in Early-Fescue treatments; high quantities of Fescue resulted in a microbial bloom that reduced DO to < 2 mg/L for several days, resulting in low hatching success. This effect was eliminated in treatments with supplemental aeration. Finally, we confirmed that experimentally observed DO patterns also occurred in the field. Context (i.e., timing of inundation relative to amphibian breeding) is critical to understanding the effects of subsidies on amphibian populations; early and explosively breeding species may experience catastrophic mortality due to DO depletion; whereas, species that breed later may experience enhanced fitness of recruits. Considering the effects of non-native species across different ecological contexts is necessary for elucidating the extent of their impacts.
登录
查看更多内容
池塘干燥与蝾螈Ambystoma talpoideum繁殖成功的关系
DOI：
--
发表时间：
1987
期刊：
影响因子：
--
作者：
R. D. Semlitsch
通讯作者：
R. D. Semlitsch
影响因子：
4.8
作者：
FISH, D;CARPENTER, SR
通讯作者：
CARPENTER, SR
南部森林的外来入侵植物
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
J. H. Miller
通讯作者：
J. H. Miller
影响因子：
2.6
作者：
Michael J. Rubbo;L. Belden;J. Kiesecker
通讯作者：
J. Kiesecker
补贴质量对互惠补贴的影响：落叶层物种如何改变青蛙生物量出口
影响因子：
2.7
作者：
J. Earl;Paula O. Castello;Kara E. Cohagen;R. D. Semlitsch
通讯作者：
R. D. Semlitsch