Leaf litter degradation in the wave impact zone of a pre-alpine lake

Pabst, Simone; Scheifhacken, Nicole; Hesselschwerdt, John; Wantzen, Karl M.

doi:10.1007/s10750-008-9477-y

Cited by 19 publications

(14 citation statements)

References 43 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In lakes, fragmentation by physical abrasion probably has a minimal influence on decomposition. However, waves and water circulation may be important for the processing of detritus (Pabst et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

Leaf degradation of Salix humboldtiana Willd. (Salicaceae) and invertebrate colonization in a subtropical lake (Brazil)

Telöken¹,

Albertoni²,

Palma‐Silva³

2011

Acta

View full text Add to dashboard Cite

Aim: To evaluate leaf degradation and invertebrate colonization of Salix humboldtiana Willd. in a subtropical shallow lake on the coastal plain of Rio Grande do Sul, Brazil; Methods: Litter bags containing 6.85 g of leaves were incubated in the superficial layer of sediment in the littoral region for 1, 4, 7, 14, 32, 47 and 71 days; Results: After 71 days, a loss of 51% of the initial leaf weight was observed (k = 0.0100 d -1). We estimated that it would take 300 days to lose 95% of the initial weight. A total of 16040 organisms and 35 taxa were identified. Caenidae (25.9%), Oligochaeta (19%), Ostracoda (13.8%), Hydracarina (9.8%), Tanypodinae (9.7%) and Coenagrionidae (7.7%) were the most highly represented taxa. We observed increases in density, richness and diversity of taxa over time, with a stabilizing trend noted in the taxa diversity. Regarding the functional trophic groups (FTGs), gathering-collectors accounted for 57.6% of the community, while predators (25%), scrapers (15.8%), filtering-collectors (0.88%) and shredders (0.73%) were also represented. The diversity and evenness of the FTGs had stabilized by day 14; Conclusions: S. humboldtiana detritus provides a favorable habitat for a sufficient duration to support a high density and diversity of aquatic invertebrates. The small percentage of shredders indicates the minor influence of the invertebrate community on the rate of detrital degradation. The main contribution of invertebrates to detrital processing comes from the consumption of fine particulate organic matter by gathering-collectors.Keywords: leaf decay coefficients, decomposition, functional trophic groups, sandy coastal plain.Resumo: Objetivos: Avaliar a degradação foliar de Salix humboldtiana Willd. e a colonização pela comunidade de invertebrados aquáticos em um lago raso subtropical, planície costeira do Rio Grande do Sul, Brasil; Métodos: Bolsas de decomposição contendo 6,85 g de folhas foram incubadas na região litorânea, na superfície do sedimento, e retiradas após 1, 4, 7, 14, 32, 47 e 71 dias de decomposição; Resultados: Aos 71 dias foi registrada a degradação de 51% do peso inicial (k = 0,0100 d -1 ). O tempo estimado para a degradação de 95% do peso inicial dos detritos foi 300 dias. Foram identificados 16.040 organismos, distribuídos em 35 táxons. Caenidae (25,9%), Oligochaeta (19%), Ostracoda (13,8%), Hydracarina (9,8%), Tanypodinae (9,7%) e Coenagrionidae (7,7%) foram os táxons mais representativos. Foi observado incremento na riqueza, densidade e diversidade dos táxons ao longo do tempo, com tendência à estabilização dos valores de diversidade. Em relação aos grupos tróficos funcionais (GTFs), coletores-catadores representaram 57,6% da comunidade, enquanto predadores (25%), raspadores (15,8%), coletores-filtradores (0,88%) e fragmentadores (0,73%) também foram representados. A diversidade e homogeneidade dos GTFs apresentaram estabilização a partir do 14º dia; Conclusões: Os detritos de S. humboldtiana fornecem um habitat favorável por tempo suficiente para suportar ...

show abstract

Section: Methodsmentioning

confidence: 99%

Leaf degradation of Salix humboldtiana Willd. (Salicaceae) and invertebrate colonization in a subtropical lake (Brazil)

Telöken¹,

Albertoni²,

Palma‐Silva³

2011

Acta

View full text Add to dashboard Cite

show abstract

“…Fungi and straminipilous organisms commonly occur in water reservoirs of various types and have a substantial effect on the functioning of the hydro-ecosystems [17][18][19][20]. They play a major role in inland waters, are the source of food for numerous invertebrates, and mineralize organic matter -thus facilitating the process of self-purification.…”

Section: Discussionmentioning

confidence: 99%

Aquatic Fungi and Straminipilous Organisms in the Lakes of the Ełckie District

Godlewska¹,

Kiziewicz²,

Muszyńska³

et al. 2016

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

We analyzed the species composition of fungi and straminipilous organisms in relation to hydrochemical conditions in six lakes within the Ełckie Lake District. The mycological investigations conducted in two vegetative seasons (2014-15) identified 44 species (eight aquatic fungi and 36 straminipilous organisms). The largest number of fungus species were found in lakes Łaśmiady (23), Szarek (22), and Krzywe (20), and the fewest were detected in Ełckie (12), Rajgrodzkie (13), and Dręstwo (14). The diversity of the quantitative and qualitative composition of the mycobiota was probably associated with the content of biogenic compounds and organic substances in the water. The elevated levels of these parameters (lakes: Łaśmiady, Szarek, and Krzywe) stimulated the growth and development of fungi and straminipilous organisms, whereas very high levels of biogenic compounds and organic matter (Lake Ełckie) and their very low content (Lake Dręstwo) had an inhibitory effect.Among the isolated taxa, there were parasites of amphibians and their spawn, and fish and eggs, including Achlya americana, Ac. polyandra, Saprolegnia parasitica, and S. ferax. Some species included pathogens of crayfish and other aquatic crustaceans such as Myzocytium microsporum, M. zoophthorum, Aphanomyces astaci, and Ap. daphniae. Some fungi appeared to be potentially pathogenic to humans, like Aspergillus niger and Candida tropicalis. Such species as Achlya klebsiana, Ac. prolifera, Leptolegnia caudata, Nowakowskiella elegans, N. macrospora, Pythium inflatum, and Saprolegnia litoralis were common phytosaprobionts.Statistical analysis of the results was conducted to determine a correlation in the number of the species of fungi and straminipilous organisms with such hydrochemical parameters as the levels of oxygen, carbon dioxide, and biochemical oxygen demand within a five-day period (BOD 5 ) , chemical oxygen demand (COD), calcium carbohydrate, nitrate nitrogen, phosphates, chlorides, dry mass, dissolved substances, and suspension. The differences noted in the species composition of the mycobiota in the lakes studied resulted from, among other things, the physicochemical properties of water. Such parameters as the contents of oxygen, nitrate nitrogen, phosphates, dry residue, dissolved substances, and suspension showed a positive

show abstract

“…This is also true for lotic systems, and fungi introduce allochthonous leaf litter compounds into the food web of streams. Current knowledge of fungal ecology in lakes, however, is very rudimentary, with only a few studies having examined fungi on allochthonous leaf litter in lakes (Nilsson 1964, Casper 1965, Mishra & Tiwari 1983, Baldy et al 2002, Pabst et al 2008. Depending largely on lake size and on the surrounding vegetation, allochthonous leaf litter carbon may contribute the equivalent of up to 10% of phytoplankton production in small lakes (Gasith & Hasler 1976).…”

Section: Decomposition Process Of Particulate Organic Matter (Pom)mentioning

confidence: 99%

“…3). In oxygen-rich, wave-impacted zones, litter is colonized and conditioned by fungi and mechanically disintegrated by invertebrates (primarily by shredders and scrapers) and wave action (Baldy et al 2002, Bohman 2005, Pabst et al 2008. In contrast, litter deposited in sheltered areas decomposes under low oxygen conditions.…”

Section: Decomposition Process Of Particulate Organic Matter (Pom)mentioning

confidence: 99%

Fungi in lake ecosystems

Wurzbacher¹,

Bärlocher²,

Grossart³

2010

Aquat. Microb. Ecol.

205

170

View full text Add to dashboard Cite

This review highlights the presence and ecological roles of fungi in lakes, and aims to stimulate research in aquatic mycology. In the study of lentic systems, this field is an almost completely neglected topic and, if considered at all, has often been restricted to specific groups of fungi, such as yeasts, filamentous fungi (e.g. aquatic hyphomycetes), or phycomycetes (an obsolete taxonomic category that included various fungal and fungal-like organisms). We document that aquatic fungi are common in various lentic habitats. They play potentially crucial roles in nutrient and carbon cycling and interact with other organisms, thereby influencing food web dynamics. The development and application of molecular methods have greatly increased the potential for unraveling the biodiversity and ecological roles of fungi in lake ecosystems. We searched the literature for reports on all fungi occurring in lake ecosystems. The present study summarizes information on the highly diverse mycoflora in lake microhabitats and highlights the main processes they influence. We also point out ecological niches of fungi in lakes that have been examined only superficially or ignored completely. We demonstrate that we now have the methodology to perform systematic studies to finally fill in some of the large gaps in this field.

show abstract

Leaf litter degradation in the wave impact zone of a pre-alpine lake

Cited by 19 publications

References 43 publications

Leaf degradation of Salix humboldtiana Willd. (Salicaceae) and invertebrate colonization in a subtropical lake (Brazil)

Leaf degradation of Salix humboldtiana Willd. (Salicaceae) and invertebrate colonization in a subtropical lake (Brazil)

Aquatic Fungi and Straminipilous Organisms in the Lakes of the Ełckie District

Fungi in lake ecosystems

Contact Info

Product

Resources

About