Сезонные изменения содержания общей ртути у мелких млекопитающих в лесных экосистемах вблизи г. Череповца Вологодской области

Ртуть является одним из наиболее опасных загрязнителей окружающей среды вследствие ее высокой токсичности для животных и человека. Целью исследования являет- ся определение наличия или отсутствия сезонных изменений содержания ртути у мелких млекопитающих в лесных экосистемах вблизи г. Череповца. Изучали шерсть, органы и тка- ни обыкновенной бурозубки (Sorex araneus Linnaeus, 1758) и лесной мыши (Apodemus ura- lensis Pallas, 1811) в течение сентября 2020 – августа 2021 гг. Содержание общей ртути (OHg) в высушенных образцах (n = 319) определяли на ртутном анализаторе PA-915+ с приставкой ПИРО атомно-абсорбционным методом холодного пара. Индивидуальные со- держания OHg у лесной мыши варьируют от < 0.001 (предела чувствительности прибора) в почках, селезенке, мозге, мышцах, печени до 0.560 мг/кг сухой массы в селезенке, среднее максимальное значение OHg было в селезенке (0.179±0.072 мг/кг) и минимальное в мышцах (0.023±0.011 мг/кг). Индивидуальные содержания OHg у обыкновенной бурозубки варьи- руют от < 0.001 (предела чувствительности прибора) в мозге до 4.570 мг/кг сухой массы в шерсти, среднее максимальное значение OHg было в шерсти (0.754±0.152 мг/кг), а среднее минимальное – в печени (0.112±0.013 мг /кг). Было установлено, что уровень концентраций OHg у обыкновенных бурозубок выше зимой, чем летом, статистически значимые различия установлены для шерсти, мышц и печени (H = 9.427, p = 0.008; H = 13.828, p = 0.001; H = = 6.864, p = 0.033 соответственно). Межвидовое сравнение показало различия в сезонных изменениях содержания OHg: осенью оно было выше у обыкновенной бурозубки, чем у лесной мыши, статистически значимые различия установлены для шерсти, почек и мышц (H = 23.143, p = 0.005; H = 19.905, p = 0.046; H = 33.418, p = 0.001 соответственно).

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