Shading of periphyton communities by wetland emergent macrophytes: Decoupling of algal photosynthesis from microbial nutrient retention

Grimshaw, Herbert J.; Wetzel, R. G.; Brandenburg, M.; Segerblom, K.; Wenkert, L. J.; Marsh, G. Alex; Charnetzky, W.; Haky, J. E.; Carraher, Charles E.

doi:10.1127/archiv-hydrobiol/139/1997/17

Cited by 60 publications

(2 citation statements)

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“…Light has been shown to be the overriding factor controlling aquatic primary biomass and productivity in wetlands (Diehl et al 2002, Davies et al 2008, Vadeboncoeur et al 2014, Hall et al 2015, Pettit et al 2016, Jia et al 2020. Light availability is affected by different physicochemical parameters such as turbidity (Chandler 1942) and dissolved organic carbon (Kirk 1994), and also by biological features such as shading from macrophyte cover (Grimshaw et al 1997, Yeh et al 2011, Pettit et al 2016. Nutrient availability also plays a major role in bottom-up control of algal productivity, with nitrogen and phosphorus as common limiting nutrients (Tilman et al 1982, Vadeboncoeur et al 2001, 2006, Elser et al 2007.…”

Section: Introductionmentioning

confidence: 99%

Relationships between algal primary productivity and environmental variables in tropical floodplain wetlands

et al. 2021

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Floodplain wetlands are among the most productive and biodiverse ecosystems on Earth and provide a major subsidy of food resources for consumers in river systems. The basal energy source for those consumers in many systems comes from aquatic algal production influenced by different characteristics of the floodplain environment. Our aim was to estimate relationships between algal productivity and environmental variables in the channels and wetlands of the Mitchell River floodplain in tropical Australia. We measured physical, chemical, and biological variables in a range of different wetland types (palustrine, lacustrine, and riverine) and different habitat types (emergent macrophytes, floating macrophytes, submerged macrophytes, and open water). The most productive areas were found among riverine wetlands and submerged habitats. The statistical models showed that habitat type and turbidity alone can predict algal productivity with reasonable accuracy (pseudo-R 2 = 0.35, n = 63). Importantly, those attributes can be measured using remote sensing, and hence the model can be used to predict algal productivity over wider spatial scales and identify important "hotspot" areas of primary productivity that sustain aquatic food webs. Through this approach we can inform current conservation and water planning frameworks to manage the impact of human development on the productivity of wetlands at large spatial scales.

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Section: Introductionmentioning

confidence: 99%

Relationships between algal primary productivity and environmental variables in tropical floodplain wetlands

et al. 2021

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“…We first describe changes in periphyton biomass and PLFA profiles due to P‐enrichment and management of P‐impacted regions relative to a low P reference region. It was hypothesized that algal biomass and PLFA composition would differ (1) in the P‐enriched region between the densely vegetated control plots that have abundant cattail relative to created open‐water managed plots with limited emergent macrophyte canopy due to greater light availability (Cashman et al, 2013; Grimshaw et al, 1997; Hill et al, 2011); and, (2) along the P‐gradient from markers diagnostic of cyanobacteria and diatoms to those for green algae. In the Everglades, cyanobacteria and diatoms are prominent in low P regions whereas green algal abundance increases and cyanobacteria may decrease with eutrophication (Browder et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Lipid Composition Differences of Periphyton, Crustaceans, and Small Fishes in Response to Eutrophication and Management in the Florida Everglades,USA

Bellinger¹,

Cook

Hagerthey

et al. 2020

Lipids

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Eutrophication of the Florida Everglades, USA, has altered the characteristics of the ecosystem, but management strategies are being implemented to accelerate recovery. In this study, we described lipid compositional similarities and differences between periphyton, fish, and crustaceans, and explored if eutrophication and creation of new open‐water sloughs in phosphorus (P)‐impacted regions of a Northern Everglades impoundment resulted in changes in periphyton biomass and lipid composition, and the lipid composition of a ubiquitous omnivore, Gambusia holbrooki. Lipid biomarker analysis provided insight into microbial community composition, quality of basal resources, and potential resources utilized by consumers. Periphyton biomass and phospholipid fatty acid (PLFA) composition differed in response to eutrophication, but not between P‐impacted control and treatment plots. Shifts in relative abundances of lipids indicative of diatoms and green algae mirrored known taxonomic shifts due to eutrophication. For fauna, PLFA were a small and relatively distinct component of the overall total lipid make‐up, and profiles were similar between control and treatment plots. However, the PLFA profile of G. holbrooki differed between oligotrophic and eutrophic regions. Fish and crustacean lipids contained significantly greater relative abundances of polyunsaturated fatty acids than were found in periphyton, and profiles differed between fish and crustaceans, suggesting organisms were selectively accumulating or elongating and desaturating lipids de novo, to meet physiological needs. This study builds on findings of microbial responses to eutrophication and recent observations that consumer PLFA profiles can also shift with P‐enrichment.

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Invasive plants: the process within wetland ecosystems

Wetzel

Invasive Plants: Ecological and Agricultural Aspects

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Shading of periphyton communities by wetland emergent macrophytes: Decoupling of algal photosynthesis from microbial nutrient retention

Cited by 60 publications

References 0 publications

Relationships between algal primary productivity and environmental variables in tropical floodplain wetlands

Relationships between algal primary productivity and environmental variables in tropical floodplain wetlands

Lipid Composition Differences of Periphyton, Crustaceans, and Small Fishes in Response to Eutrophication and Management in the Florida Everglades,USA

Invasive plants: the process within wetland ecosystems

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