Roles of understudied species in ecosystem functioning
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Understudied and Rare Species: Unique Roles in Ecosystem Functioning
Research shows that while dominant species often drive many ecosystem processes, understudied and rare species can make significant, sometimes unique, contributions to ecosystem functioning. These species may support specific functions that are not maintained by more common species, highlighting their importance in maintaining ecosystem health and resilience Lyons2005Zhang2022Zabala-Forero2025.
Functional Singularity and Multifunctionality in Ecosystems
Studies on biological soil crusts and other communities reveal that many species, including those less studied, have highly individual effects on multiple ecosystem functions. This “functional singularity” means that even species considered redundant based on morphology or abundance may play irreplaceable roles when multiple ecosystem functions are considered together Bowker2011Slade2017Mori2023. For example, certain lichens and mosses in soil crusts uniquely influence carbon, nitrogen, and phosphorus cycling, and their loss can disrupt these processes .
The Impact of Rare and Low-Abundance Species
Rare and low-abundance species often possess unique traits and contribute disproportionately to ecosystem multifunctionality. Their diversity is positively linked to the ability of ecosystems to perform multiple functions simultaneously, such as nutrient cycling, productivity, and stability Zhang2022Zabala-Forero2025. In some cases, rare species support specific functions that abundant species do not, and their loss can lead to declines in functional diversity and ecosystem resilience Zhang2022Zabala-Forero2025.
Biodiversity, Species Richness, and Ecosystem Health
Overall biodiversity, including the presence of rare and understudied species, is crucial for maintaining ecosystem productivity, nutrient retention, and stability Yan2023Kinnison2019Albrecht2021. High species richness, rather than just the presence of dominant species, is a stronger driver of ecosystem functioning, especially in heterogeneous environments Yan2023Albrecht2021. This underscores the need to conserve a wide range of species, not just the most common or well-studied ones.
Invertebrates and Other Underappreciated Groups
Invertebrates, which are often understudied, play central roles in ecosystem processes such as decomposition, pollination, and nutrient cycling. Their decline can have cascading effects on ecosystem functioning, emphasizing the need for greater research and conservation focus on these groups .
Conservation Implications
Given the unique and sometimes irreplaceable roles of understudied and rare species, conservation strategies should prioritize maintaining high levels of biodiversity, including these less common species. This approach is prudent, as the full extent of their contributions to ecosystem functioning is not yet fully understood and may be critical for ecosystem resilience and human well-being Lyons2005Yan2023Mori2023.
Conclusion
Understudied and rare species are vital for ecosystem multifunctionality and resilience. Their unique contributions, often overlooked, highlight the importance of broad biodiversity conservation efforts to sustain healthy and functioning ecosystems Lyons2005Bowker2011Zhang2022+4 MORE.
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