Are pools created when restoring extracted peatlands biogeochemically similar to natural peatland pools?

IF 4.3 2区 环境科学与生态学 Q1 ECOLOGY
Émilie Jolin, Julien Arsenault, Julie Talbot, Mahmud Hassan, Line Rochefort
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Abstract

In the last 25 years, several degraded peatlands in eastern Canada have been restored toward their natural structure. Pools are common in natural peatlands and are important habitats for unique flora and fauna. Because of their ecological value, pools have been created in some restored peatland sites. Nevertheless, the biogeochemistry of created pools in a restoration context has seldom been studied. The objective of our study is to characterize the biogeochemistry of created pools from restored peatlands and compare them with natural pools along a chronosequence since their creation. We measured different biogeochemical variables (pH, concentrations of nitrogen (N), phosphorus (P), dissolved organic carbon (DOC), dissolved organic matter (DOM), base cations-calcium (Ca), sodium (Na), magnesium (Mg), and potassium (K)-and dissolved gases-methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O)-) in 61 pools distributed over seven peatlands in eastern Canada. The sites represent a range of conditions, from natural to restored peatlands with pools ranging from 3 to 22 years old. Created and natural pools had distinctive biogeochemistry, with created pools being generally less acidic (pH >5) and 2.5 times more concentrated in nutrients (N and P) than in natural pools. DOC, N, P, dissolved gases, and base cations concentrations were lower in natural pools than in created pools, and varied between created sites. The oldest created pools (age >17 years) tend to approach the biogeochemical characteristics of natural pools, indicating that created pools may, over time, provide habitats with similar conditions to natural pools. A return of created pools to a natural pool-like biogeochemistry could thus inform on the success of peatland restoration.

恢复采掘泥炭地时形成的泥炭地池在生物地球化学方面是否与天然泥炭地池相似?
在过去 25 年中,加拿大东部一些退化的泥炭地已经恢复了自然结构。池塘在天然泥炭地中很常见,是独特动植物的重要栖息地。由于其生态价值,一些泥炭地的恢复地点还建造了水池。然而,人们很少研究在修复环境中形成的水池的生物地球化学。我们的研究目的是描述泥炭地修复后形成的水池的生物地球化学特征,并将其与自然水池自形成以来的时间序列进行比较。我们测量了分布在加拿大东部七个泥炭地的 61 个水池中的不同生物地球化学变量(pH 值、氮(N)、磷(P)、溶解有机碳(DOC)、溶解有机物(DOM)、碱阳离子--钙(Ca)、钠(Na)、镁(Mg)和钾(K)--以及溶解气体--甲烷(CH4)、二氧化碳(CO2)和氧化亚氮(N2O)--的浓度)。这些地点代表了从自然泥炭地到修复泥炭地的各种条件,池龄从 3 年到 22 年不等。人造水池和天然水池具有不同的生物地球化学特征,人造水池的酸性通常较低(pH 值大于 5),营养物质(氮和磷)的浓度是天然水池的 2.5 倍。天然水池中的 DOC、N、P、溶解气体和碱阳离子浓度均低于人工水池,而且不同人工水池的情况也不尽相同。最老的人工水池(年龄大于 17 岁)往往接近天然水池的生物地球化学特征,这表明人工水池随着时间的推移,可能会提供与天然水池条件相似的栖息地。因此,人造水池恢复到类似于天然水池的生物地球化学特征可以为泥炭地恢复的成功提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ecological Applications
Ecological Applications 环境科学-环境科学
CiteScore
9.50
自引率
2.00%
发文量
268
审稿时长
6 months
期刊介绍: The pages of Ecological Applications are open to research and discussion papers that integrate ecological science and concepts with their application and implications. Of special interest are papers that develop the basic scientific principles on which environmental decision-making should rest, and those that discuss the application of ecological concepts to environmental problem solving, policy, and management. Papers that deal explicitly with policy matters are welcome. Interdisciplinary approaches are encouraged, as are short communications on emerging environmental challenges.
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