A non-destructive method to assess the status of Posidonia oceanica meadows
07 января 2021 года
17:15
A non-destructive method to assess the status of Posidonia oceanica meadows
Текст новости:
Title: A non-destructive method to assess the status of Posidonia oceanica meadows
Author, co-author: Gobert, Sylvie; Lefebvre, Laurence; Boissery, P.; Richir, Jonathan
Abstract: This paper presents a new non-destructive sampling technique that consists of cutting all of the leaves of a Posidonia oceanica shoot (with scissors) just above the ligula of the external leaves. Developed in an undisturbed meadow in Corsica (France) at depths of 12–15 m, this sampling technique is called the Non-Destructive Shoot sampling Method (NDSM). The results of using this method indicate that most biometric parameters and relevant water quality indices can be measured and calculated from seagrasses sampled using the NDSM. It was determined that sampling shoots using the NDSM ensured a 100% survival rate. Notably, the NDSM allowed sampled shoots to grow back to lengths similar to those of an adjacent control meadow within three months. Biochemical analyses indicated that meadow portions and seagrass leaves regrown after NDSM sampling differed little in chemical composition (C, N and P and essential metal micronutrients Fe, Cu, Zn, Mn, Ni and Mo) to control seagrasses. Thus, the NDSM limits the negative effects of the sampling. Although not lethal to the plant, sampling seagrasses according to the NDSM requires exemption from the competent authority according to local, regional or national regulations for each protected species. © 2020 Elsevier Ltd

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Текст со страницы (автоматическое получение):
A non-destructive method to assess the status of Posidonia oceanica meadows
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Keywords :
[en] Mediterranean Sea ; Non-destructive shoot sampling method ; Posidonia oceanica ; Protected species ; Chemical analysis ; Non-destructive examination ; Water quality ; Biochemical analysis ; Biometric parameters ; Chemical composition ; Competent authorities ; Non-destructive method ; Sampling technique ; Water quality index ; Plants (botany) ; Ligula
Abstract :
[en] This paper presents a new non-destructive sampling technique that consists of cutting all of the leaves of a Posidonia oceanica shoot (with scissors) just above the ligula of the external leaves. Developed in an undisturbed meadow in Corsica (France) at depths of 12–15 m, this sampling technique is called the Non-Destructive Shoot sampling Method (NDSM). The results of using this method indicate that most biometric parameters and relevant water quality indices can be measured and calculated from seagrasses sampled using the NDSM. It was determined that sampling shoots using the NDSM ensured a 100% survival rate. Notably, the NDSM allowed sampled shoots to grow back to lengths similar to those of an adjacent control meadow within three months. Biochemical analyses indicated that meadow portions and seagrass leaves regrown after NDSM sampling differed little in chemical composition (C, N and P and essential metal micronutrients Fe, Cu, Zn, Mn, Ni and Mo) to control seagrasses. Thus, the NDSM limits the negative effects of the sampling. Although not lethal to the plant, sampling seagrasses according to the NDSM requires exemption from the competent authority according to local, regional or national regulations for each protected species. © 2020 Elsevier Ltd
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Автоматическая система мониторинга и отбора информации
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