Ключевые слова: aldercarr, bialowieza, common, dawn, duckweed, ecosystem, endangered, europe, foliage, forest, green, lemna, lesser, lush, marsh, marshy, minor, morning, natural, nature, podlasie, poland, reserve, retention, season, seasonal, summer, sunny, sunrise, swamp, swampy, tree, trunk, warm, water, woodland, woods,