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Herbivory by spadefoot toad tadpoles and reduced water level affect submerged plants in temporary ponds
Inland Waters ( IF 3.1 ) Pub Date : 2021-07-23 , DOI: 10.1080/20442041.2021.1933855
Maria Jesús Pinero-Rodríguez 1 , Ivan Gomez-Mestre 1 , Carmen Díaz-Paniagua 1
Affiliation  

ABSTRACT

In temporary ponds, submerged plants have adapted to recurrent periods of drought. These ponds often lack the impact of large herbivores but can harbor large numbers of herbivorous tadpoles. Tadpoles of the Iberian spadefoot toad (Pelobates cultripes) may reach large body size and consume large quantities of macrophytes during their long larval period, which is shortened with risk of pond drying. We conducted a mesocosm experiment to analyze the interplay between hydroperiod and impact of herbivorous tadpoles on the abundance and life history of 3 species of submerged plants common to temporary ponds. We observed differences in growth among plant species resulting in lags in timing of maximum cover, probably related to interspecific competitive interactions. Some plants responded to pond drying with a remarkable increase in the production of flowers. Tadpoles greatly reduced the plant cover, although their impact varied across plant species. Differential plant consumption by these large tadpoles can substantially modify the internal structure and complexity of temporary ponds, and tadpoles can also interfere with plant responses to shortened hydroperiod.



中文翻译:

蝾螈蝌蚪的食草行为和水位降低影响临时池塘中的沉水植物

摘要

在临时池塘中,沉水植物已经适应了反复出现的干旱时期。这些池塘通常缺乏大型食草动物的影响,但可以容纳大量食草蝌蚪。伊比利亚铲足蟾蜍的蝌蚪(Pelobates cultripes) 可能会在其较长的幼虫期中达到较大的体型并消耗大量的大型植物,随着池塘干燥的风险而缩短。我们进行了中观实验,以分析水期与草食性蝌蚪对临时池塘常见的 3 种沉水植物的丰度和生活史的影响之间的相互作用。我们观察到植物物种之间的生长差异导致最大覆盖时间的滞后,这可能与种间竞争相互作用有关。一些植物对池塘干燥的反应是鲜花产量显着增加。蝌蚪大大减少了植物覆盖,尽管它们的影响因植物物种而异。这些大蝌蚪对植物的不同消耗可以大大改变临时池塘的内部结构和复杂性,

更新日期:2021-07-23
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