Phosphorus, nitrogen, and carbon contents of macrophytes in lakes lateral to a tropical river (Paranapanema River, São Paulo, Brazil)

Costa, Mara Lucia Rodrigues; Henry, Raoul

doi:10.4322/actalb.02202002

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…We highlight that these lakes are not discrepant environments, as shown by the similar physical and chemical water conditions (Table S1). Also, previous studies support the high availability of the main categories of food for aquatic insects in these lakes: algae (Henry et al ; Granado & Henry ), microcrustaceans (Panarelli et al ) and OM (Costa & Henry ), while the potential predation by fishes is not remarkable (Carvalho et al ). Therefore, if there is any difference in insect feeding habits between these lakes, we believe that the presence or absence of macrophytes could be the main factor leading to this variation, as they can alter the quality of the resources used by aquatic insects.…”

Section: Methodssupporting

confidence: 52%

Macrophytes in tropical shallow lakes: An important food item to benthic entomofauna or an underused resource?

Shimabukuro

Henry

2019

Entomological Science

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Although macrophytes are known to increase benthic diversity in lakes, the importance of this resource as food for the insects living at the bottom of these ecosystems are still poorly understood. This study assessed the diets of benthic Chironomidae and Campsurus (Ephemeroptera) in two environments: a lake with macrophytes (M+) and another without macrophytes (M−). We expected a differential use of food resources in M+, where plant tissue is particularly important for the aquatic insects’ diet. The diet of 734 individuals from 16 taxa were analyzed. Contrary to expectations, benthic insects consumed low amounts of plant tissue. This finding led us to investigate whether the presence of macrophytes in lakes would indirectly contribute to the benthic insects’ feeding, as more food resources were explored in M+ and a spatial variation of resources intake was observed in this lake, in contrast to the homogeneous feeding in M−. We highlight that macrophytes were responsible for the organic matter build‐up in the sediment, especially at the lake region dominated by these plants, and contributed to increase the deposition of high‐quality amorphous organic matter, which favored taxa in M+ that fed exclusively on this item. The lower diversity of food items exploited in M−, and the Tanypus alga‐based diet in this lake, indicates the low quality of organic resources in its sediment. Although macrophytes were indirectly beneficial for benthic insects’ feeding, we found that this is not an attractive resource for prompt ingestion by most benthic taxa.

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Section: Methodssupporting

confidence: 52%

Macrophytes in tropical shallow lakes: An important food item to benthic entomofauna or an underused resource?

Shimabukuro

Henry

2019

Entomological Science

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“…In this period the dragging of solids in suspension occurs by means of runoff processes, mainly in regions with exposed soil in the proximity of water bodies. Many studies have reported the use of electric conductivity to assess the impact of pollutants in the aquatic environment, both rivers (Uwidia and Ukulu, 2013;Thompson et al, 2012;Vargas et al, 2015) and lakes (Das et al, 2006;Costa and Henry, 2010). The water of each region presents characteristic electric conductivity, which depends mainly on the rock types the water permeates (Tong and Chen, 2002).…”

Section: Resultsmentioning

confidence: 99%

Untitled

2018

Rev. ambiente água

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“…Herein, the most parsimonious explanatory models of the relationships between predictor variables, richness, and phylogenetic metrics showed that water quality parameters (nutrients and trace elements) and sedimentological parameters were the most important factors in explaining the assembly rules. In this sense, several investigations have attempted to explain the richness of aquatic plants, mainly through the relationship between the water quality of the environment (França et al 2003;Terneus 2007;Peralta-Peláez & Moreno-Casasola 2009;Moreno-Casasola et al 2010;Durán-Suárez et al 2011;Pereira et al 2012) and the sediment attributes (Clarke & Wharton 2001;Costa & Henry 2010;Kissoon et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic structure of aquatic plant assemblages in a climate sequence

2022

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Floristic studies of aquatic plants and flora associated with aquatic ecosystems carried out in the Neotropical region have demonstrated the predominance and co-occurrence of the same plant families under different climatic conditions. One way to interpret this co-occurrence of groups with non-random patterns in assemblages is to understand their phylogenetic structure. Herein, we present an investigation that studied the rule of phylogenetic assembly on plants associated with reservoirs in a tropical climosequence in Northeast Brazil. We studied eight areas during the dry and rainy periods and characterized their climatic, chemical, and trace elements, as well as richness, diversity, and phylogenetic structure of their assemblages. We found a predominance of the families Fabaceae, Poaceae and Cyperaceae, especially in border areas. Among the species surveyed, we highlight those with amphibian life-form, autochoric-type dispersion syndrome and the taxa with patterns of wide geographical distribution. We observed that the seasonal effect ruled patterns of phylogenetic structure with tendency for non-co-familiarity. Water quality and sediment were the abiotic factors most efficient as predictors of richness and variations in phylogenetic metrics. In this sense, the family co-occurrence identified in the assemblages was less deterministic than expected through non-randomness, because temporally, guilds were distinctly structured in function of seasonality.

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Phosphorus, nitrogen, and carbon contents of macrophytes in lakes lateral to a tropical river (Paranapanema River, São Paulo, Brazil)

Abstract: Conteúdos de fósforo, nitrogênio e carbono de macrófitas em lagoas laterais a um rio tropical (

Cited by 6 publications

References 22 publications

Macrophytes in tropical shallow lakes: An important food item to benthic entomofauna or an underused resource?

Macrophytes in tropical shallow lakes: An important food item to benthic entomofauna or an underused resource?

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Phylogenetic structure of aquatic plant assemblages in a climate sequence

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