Scholarlink

<p>Plastics are found ubiquitously in all ecosystems. The rapid&#xa0;urbanization of cities has resulted in high anthropogenic activities leading to the accumulation of domestic plastics in&#xa0;freshwater habitats. This field-based investigation of substrate-dependent periphytic microalgal diversity on natural and plastic substrates demonstrated that variations in key physicochemical parameters including electrical conductivity (120 ± 10 to 1499.33 ± 47 µS/cm), nitrate (8.64 ± 0.10 to 256.88 ± 1.95 µg/L), phosphate (16.62 ± 0.20 to 64.47 ± 1.28 µg/L), and potassium (0.87 ± 0.10 to 29.31 ± 0.11 µg/L) strongly influenced the composition and diversity of periphytic microalgal communities. The Shannon–Wiener index indicated high green algal richness (H′ = 3.067) and diatoms (H′ = 2.431) in the peripheral zone, whereas cyanobacteria (H′ = 2.625) were dominant in the contaminated urban zone. These findings highlight the ecological plasticity of microalgae in producing biofilms and forming communities on specific substrates. The periphytic potential of 14 microalgal species was confirmed through laboratory-based growth assays, demonstrating that plastic substrates provide suitable physical support for attachment and sustained growth. Species belonging to the genera <i>Chlorococcum, Uronema, Cocomyxa, Phormidium, Nostoc, Oscillatoria, Nitzschia</i>, and <i>Navicula</i> exhibited substrate specificity toward High-Density Polyethylene (HDPE), Low-Density Polyethylene (LDPE), and PolyVinyl Chloride (PVC), enabling prolonged survival on these polymer surfaces. In summary, epiplastic microalgal diversity involves interactions with plastic substrates, which have the potential to drive and shift the community structure of freshwater ecosystems in response to physiological and chemical parameters, highlighting their ecological significance and implications for freshwater ecosystem health under increasing anthropogenic pressures.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Assessing the diversity of microalgal assemblages on polymeric substrates shaped by environmental and anthropogenic factors in lentic freshwaters

  • 期刊论文

  • 发表日期：

    2026年2月10日

查看全文
  • Antony Prakash Rejoy Patrick,
  • Sagaya John Paul Joseph,
  • Nagaraj Subramani

摘要

Plastics are found ubiquitously in all ecosystems. The rapid urbanization of cities has resulted in high anthropogenic activities leading to the accumulation of domestic plastics in freshwater habitats. This field-based investigation of substrate-dependent periphytic microalgal diversity on natural and plastic substrates demonstrated that variations in key physicochemical parameters including electrical conductivity (120 ± 10 to 1499.33 ± 47 µS/cm), nitrate (8.64 ± 0.10 to 256.88 ± 1.95 µg/L), phosphate (16.62 ± 0.20 to 64.47 ± 1.28 µg/L), and potassium (0.87 ± 0.10 to 29.31 ± 0.11 µg/L) strongly influenced the composition and diversity of periphytic microalgal communities. The Shannon–Wiener index indicated high green algal richness (H′ = 3.067) and diatoms (H′ = 2.431) in the peripheral zone, whereas cyanobacteria (H′ = 2.625) were dominant in the contaminated urban zone. These findings highlight the ecological plasticity of microalgae in producing biofilms and forming communities on specific substrates. The periphytic potential of 14 microalgal species was confirmed through laboratory-based growth assays, demonstrating that plastic substrates provide suitable physical support for attachment and sustained growth. Species belonging to the genera Chlorococcum, Uronema, Cocomyxa, Phormidium, Nostoc, Oscillatoria, Nitzschia, and Navicula exhibited substrate specificity toward High-Density Polyethylene (HDPE), Low-Density Polyethylene (LDPE), and PolyVinyl Chloride (PVC), enabling prolonged survival on these polymer surfaces. In summary, epiplastic microalgal diversity involves interactions with plastic substrates, which have the potential to drive and shift the community structure of freshwater ecosystems in response to physiological and chemical parameters, highlighting their ecological significance and implications for freshwater ecosystem health under increasing anthropogenic pressures.