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Abstract <p>Canadian rice <i>Zizania aquatica</i> and <i>Z. palustris</i> has long been recommended for dispersal beyond its natural range, since it can be used as an agricultural crop and/or a means of improving forage supply for waterfowl on lakes. In the past, repeated attempts were made to introduce Canadian rice to Northwest Russia, including the water bodies in the Leningrad Region, the surrounding area of St. Petersburg. Observations and generalization of published data revealed “rice fields” occupying an area of several dozen hectares on four lakes. Canadian rice was likewise found to occur in small quantities on several other water bodies. This plant has naturalized, but has been dispersing slowly. Canadian rice occupies specific biotopes, namely, shallow waters with heavily silted substrates and no currents where local plants are scarce. Canadian rice poses no harm to local ecosystems. There is no interest in its commercial use, while the attitude toward the invasion is usually either indifferent or negative.</p>

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“Rice Fields” around St. Petersburg

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • I. Y. Popov,
  • E. V. Abakumov

摘要

Abstract

Canadian rice Zizania aquatica and Z. palustris has long been recommended for dispersal beyond its natural range, since it can be used as an agricultural crop and/or a means of improving forage supply for waterfowl on lakes. In the past, repeated attempts were made to introduce Canadian rice to Northwest Russia, including the water bodies in the Leningrad Region, the surrounding area of St. Petersburg. Observations and generalization of published data revealed “rice fields” occupying an area of several dozen hectares on four lakes. Canadian rice was likewise found to occur in small quantities on several other water bodies. This plant has naturalized, but has been dispersing slowly. Canadian rice occupies specific biotopes, namely, shallow waters with heavily silted substrates and no currents where local plants are scarce. Canadian rice poses no harm to local ecosystems. There is no interest in its commercial use, while the attitude toward the invasion is usually either indifferent or negative.