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Article: Trait-based metrics as bioindicators: Responses of stream fish assemblages to a gradient of environmental degradation

Teresa, Fabrício Barreto / Lilian Casatti

Ecological indicators. 2017 Apr., v. 75

2017

Abstract: The development of biomonitoring tools is increasingly appealing in light of the increasing degradation of aquatic ecosystems. In this context, we investigated the responses of stream fish communities to the gradient of environmental degradation in ... ...

Abstract	The development of biomonitoring tools is increasingly appealing in light of the increasing degradation of aquatic ecosystems. In this context, we investigated the responses of stream fish communities to the gradient of environmental degradation in different basins using a variety of indices based on functional diversity, functional composition, and taxonomic diversity. We used datasets from three Brazilian ecoregions. In order to describe the gradient of environmental degradation we scored streams based on local and landscape variables. The functional structure of the assemblages was described in relation to seven functional traits related to habitat use, swimming capacity, and maneuverability. We described assemblages in each ecoregion separately in relation to 20 potential indicators, grouped in four families: indices of functional diversity based on presence/absence (FDp/a); indices of functional diversity weighted by abundance (FDabund); indices of functional composition (mT); and, indices based on taxonomic diversity (TDiv). The relationship between the indicators and the gradient of environmental degradation were evaluated using linear regression. We found a significant interaction effect (ANOVA, p=0.006) between group of indices and ecoregions for the performance of indicators, suggesting a context-dependent response. The indices, on an individual basis, had variable performance and consistency among ecoregions. Four mT indicators demonstrated the highest average performance and consistency. Taxonomic diversity indicators consistently had the lowest average performance, while FDp/a and FDabund indicators had low average performance and variable inter-regional consistency. The differential inter-regional performance of indicators was due to the differences in the lengths of the gradients of environmental degradation. Our results indicate that functional traits have greater predictive power compared to taxonomic indicators for fish responses to a gradient of environmental degradation. Although indicators of functional composition are the most promising, we emphasize that caution is needed when generalizing functional diversity indicators across ecoregions because most of them are context-dependent.
Keywords	aquatic ecosystems ; basins ; data collection ; ecoregions ; environmental degradation ; environmental monitoring ; fish ; fish communities ; functional diversity ; habitat preferences ; landscapes ; maneuverability ; regression analysis ; species diversity ; streams ; swimming
Language	English
Dates of publication	2017-04
Size	p. 249-258.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2036774-0
ISSN	1872-7034 ; 1470-160X
ISSN (online)	1872-7034
ISSN	1470-160X
DOI	10.1016/j.ecolind.2016.12.041
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Short-term response of fish assemblages to instream habitat restoration in heavily impacted streams

Angelo Rodrigo Manzotti / Mônica Ceneviva-Bastos / Fabrício Barreto Teresa / Lilian Casatti

Neotropical Ichthyology, Vol 18, Iss

2020 Volume 1

Abstract: ABSTRACT Habitat homogenization has been a major impact in stream ecosystems, and it is considered one of the main drivers of biotic homogenization as well, leading to the loss of water quality and fish diversity. In this study, we added artificial woody ...

Abstract	ABSTRACT Habitat homogenization has been a major impact in stream ecosystems, and it is considered one of the main drivers of biotic homogenization as well, leading to the loss of water quality and fish diversity. In this study, we added artificial woody structures and leaf packs in physically impacted streams to test if the additions can improve habitat complexity and change the taxonomic and functional structure of fish communities. The experiment was done in eight streams impacted by siltation, deforestation, and habitat homogeneization, inserted in an agricultural landscape from the Upper Paraná River Basin, and lasted 112 days. The provision of artificial microhabitats increased instream habitat diversity by creating patches of organic matter deposits, changing flow, and providing substrate for grass colonization of the instream habitat. The experimental manipulation also changed fish species abundance. Nine species contributed to these changes, five decreased and four increased in abundance, indicating species responded differently to the experimental manipulation. However, overall species richness, diversity, and community functional traits remained unaltered. These results indicate that short-term habitat restoration on a local scale may not be enough to promote changes in fish community attributes of streams that are heavily impacted.
Keywords	Biodiversity ; Habitat Management ; Neotropical streams ; Structural Complexity ; Woody debris ; Zoology ; QL1-991
Language	English
Publishing date	2020-04-01T00:00:00Z
Publisher	Sociedade Brasileira de Ictiologia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Influence of environmental features at multiple scales and spatial structure on stream fish communities in a tropical agricultural region

Camilo A. Roa-Fuentes / Lilian Casatti

Journal of Freshwater Ecology, Vol 32, Iss 1, Pp 281-

2017 Volume 295

Abstract: Land cover change for agricultural expansion exerts strong pressures on tropical streams. We examined the relative contributions of catchment land cover, local environmental features, and spatial patterns on stream fish communities (n = 43). Explained ... ...

Abstract	Land cover change for agricultural expansion exerts strong pressures on tropical streams. We examined the relative contributions of catchment land cover, local environmental features, and spatial patterns on stream fish communities (n = 43). Explained variation in fish community structure was partitioned (p-RDA) between the explained fractions as follows: pure local 10%, pure catchment 1%, pure spatial 3%, and shared environmental and spatial 7%. Among the possible reasons for the lack of effect of catchment-scale variables on stream fish structure we can cite (1) weak associations between catchment-scale and local-scale features that are affecting stream fish communities, (2) major influence of past land cover on the present-day fish community structure compared to current land cover, or (3) the small variability in catchment variables (e.g. homogeneous landscape) is not able to overcome the impact of local-scale variables. The best practice to improve the ecological integrity of streams would be the restoration at the catchment-scale, which is impossible for agricultural lands. In areas with intense land use for agriculture and pasture, our study indicates that restoration of riparian forests and manipulation of local conditions may be an option to reduce the impacts of anthropogenic activities on the stream fish communities.
Keywords	Hierarchical classification ; stream ecology ; riparian cover ; riparian width ; reach-scale variables ; Neotropical stream fish ; agricultural landscape ; Environmental sciences ; GE1-350 ; Ecology ; QH540-549.5
Subject code	333
Language	English
Publishing date	2017-01-01T00:00:00Z
Publisher	Taylor & Francis Group
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Development of habitat suitability criteria for Neotropical stream fishes and an assessment of their transferability to streams with different conservation status

Fabrício Barreto Teresa / Lilian Casatti

Neotropical Ichthyology, Iss ahead, Pp 00-

2013 Volume 00

Abstract: We assessed the preference of 10 fish species for depth and velocity conditions in forested streams from southeastern Brazil using habitat suitability criteria (HSC curves). We also tested whether preference patterns observed in forested streams can be ... ...

Abstract	We assessed the preference of 10 fish species for depth and velocity conditions in forested streams from southeastern Brazil using habitat suitability criteria (HSC curves). We also tested whether preference patterns observed in forested streams can be transferred to deforested streams. We used data from fish sampled in 62 five-meter sites in three forested streams to construct preference curves. Astyanax altiparanae, A. fasciatus, Knodus moenkhausii, and Piabina argentea showed a preference for deep slow habitats, whereas Aspidoras fuscoguttatus, Characidium zebra, Cetopsorhamdia iheringi, Pseudopimelodus pulcher, and Hypostomus nigromaculatus showed an opposite pattern: preference for shallow fast habitats. Hypostomus ancistroides showed a multimodal pattern of preference for depth and velocity. To evaluate whether patterns observed in forested streams may be transferred to deforested streams, we sampled 64 five-meters sites in three deforested streams using the same methodology. The preference for velocity was more consistent than for depth, as success in the transferability criterion was 86% and 29% of species, respectively. This indicates that velocity is a good predictor of species abundance in streams, regardless of their condition Neste estudo avaliamos a preferência de 10 espécies de peixes por condições de profundidade e fluxo em riachos florestados do sudeste do Brasil por meio do critério de adequabilidade de habitat (habitat suitability criteria - curvas HSC). Testamos também se os padrões de preferência observados nos riachos florestados podem ser transferidos para riachos desmatados. Foram realizadas amostragens da ictiofauna em 62 trechos de cinco metros de extensão em três riachos florestados para a construção das curvas de preferência. Astyanax altiparanae, A. fasciatus, Knodus moenkhausii e Piabina argentea apresentaram preferência por habitats lentos e profundos, enquanto Aspidoras fuscoguttatus, Characidium zebra, Cetopsorhamdia iheringi, Pseudopimelodus pulcher e Hypostomus nigromaculatus apresentaram um padrão oposto de preferência por habitats rasos e de fluxo rápido. Hypostomus ancistroides apresentou um padrão de preferência por profundidade e fluxo multimodal. Para avaliar se os padrões observados nos riachos florestados podem ser transferidos para riachos desmatados foram realizadas amostragens da ictiofauna em 64 trechos de cinco metros de extensão em três riachos desmatados utilizando a mesma metodologia aplicada aos riachos florestados. O sucesso na transferência do critério foi de 86% e 29% para fluxo e profundidade, ou seja, a preferência por fluxo foi mais consistente do que por profundidade. Isso indica que o fluxo é um bom preditor da abundância das espécies em riachos, independentemente do seu estado de conservação
Keywords	Depth ; Fish assemblages ; Habitat preference ; Riparian forest ; Velocity ; Zoology ; QL1-991
Language	English
Publishing date	2013-01-01T00:00:00Z
Publisher	Sociedade Brasileira de Ictiologia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Generalist populations formed by generalist individuals

Rafaela Carvalho Neves / Pedro Paulino Borges / Jaquelini de Oliveira Zeni / Lilian Casatti / Fabrício Barreto Teresa

Acta Limnologica Brasiliensia, Vol

a case of study on the feeding habits of a Neotropical stream fish

2021 Volume 33

Abstract: Abstract: Aim We described the diet of the generalist stream fish Knodus chapadae and we tested if the environmental conditions are associated with population’s diet and individual specialization. Methods We analyzed the stomach contents of 287 ... ...

Abstract	Abstract: Aim We described the diet of the generalist stream fish Knodus chapadae and we tested if the environmental conditions are associated with population’s diet and individual specialization. Methods We analyzed the stomach contents of 287 individuals from 29 streams from the Brazilian savanna (Cerrado). Results The instream physical habitat structure, physiochemical conditions, and adjacent land use explained partially the variation in the diet of populations, but not the variation in the individual specialization. Thus, the diet changes observed at populational level were driven by changes in the average composition of the diet of individuals that, in turn, remained generalists along the environmental gradient. Conclusions Our results show that the trophic opportunism described for small characids was also observed in K. chapadae, whose diet shifts according to changes in environmental conditions. Furthermore, the opportunism expressed at the individual level can explain the trophic plasticity observed on the studied species.
Keywords	Characidae ; diet ; intraspecific variation ; individual specialization ; trophic niche ; Ecology ; QH540-549.5
Subject code	590
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	Associação Brasileira de Limnologia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Taxonomic and functional turnover of Amazonian stream fish assemblages is determined by deforestation history and environmental variables at multiple scales

Gabriel L. Brejão / David J. Hoeinghaus / Camilo A. Roa-Fuentes / María Angélica Pérez-Mayorga / Silvio F. B. Ferraz / Lilian Casatti

Neotropical Ichthyology, Vol 19, Iss

2021 Volume 3

Abstract: Abstract High rates of deforestation, either in the past or the present, affect many of the ecological processes in streams. Integrating deforestation history and the current landscape structure enhances the evaluation of ecological effects of land-use ... ...

Abstract	Abstract High rates of deforestation, either in the past or the present, affect many of the ecological processes in streams. Integrating deforestation history and the current landscape structure enhances the evaluation of ecological effects of land-use change. This is especially true when contemporary landscape conditions are similar but the temporal path to those conditions differs. One approach that has shown promise for evaluating biodiversity responses over time and space is the β-diversity partitioning, which combines taxonomic and functional trait-based approaches. We tested hypotheses related to stream fish assemblages’ turnover in watersheds with different environmental conditions and deforestation histories. We sampled fish from 75 watersheds in the Machado River basin, Brazil, and environmental factors were quantified at multiple scales. Taxonomic turnover was higher than expected by chance, whereas functional turnover was lower than expected by the observed taxonomic turnover, indicating that deterministic processes are structuring these assemblages. The turnover, and the environmental factors differed among watersheds with different deforestation histories. Besides being scale-dependent, turnover patterns are also likely dependent on land use dynamics and involve time-lags.
Keywords	β-diversity ; Deterministic processes ; Landscape ; Madeira River basin ; Scale-dependency ; Zoology ; QL1-991
Subject code	550
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	Sociedade Brasileira de Ictiologia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Petilipinnis, a new genus for Corvina grunniens Schomburgk, 1843 (Perciformes, Sciaenidae) from the Amazon and Essequibo river basins and redescription of Petilipinnis grunniens

Lilian Casatti

Papéis Avulsos de Zoologia, Vol 42, Iss 7, Pp 169-

2002 Volume 181

Abstract: Petilipinnis, new genus, is proposed for Corvina grunniens Schomburgk, from the Amazon and Essequibo river basins. It is distinguishable from other Sciaenidae genera with the exception of Menticirrhus, by the presence of only one spine in the anal fin. ... ...

Abstract	Petilipinnis, new genus, is proposed for Corvina grunniens Schomburgk, from the Amazon and Essequibo river basins. It is distinguishable from other Sciaenidae genera with the exception of Menticirrhus, by the presence of only one spine in the anal fin. From Menticirrhus, Petilipinnis differs by the morphology of the swimbladder and the number of dorsal fin soft rays. Also a redescription of Petilipinnis grunniens is presented.
Keywords	Petilipinnis ; freshwater Sciaenidae ; Petilipinnis grunniens ; Zoology ; QL1-991
Language	English
Publishing date	2002-06-01T00:00:00Z
Publisher	Universidade de São Paulo
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Effects of pasture conversion to sugarcane for biofuel production on stream fish assemblages in tropical agroecosystems

Zeni, Jaquelini O / David J. Hoeinghaus / Lilian Casatti

Freshwater biology. 2017 Dec., v. 62, no. 12

2017

Abstract: One of the main causes of biodiversity loss in aquatic ecosystems is instream habitat change associated with landâuse change in the drainage basin. Biofuel crop production is an increasingly important driver of landâuse change in existing ... ...

Abstract	One of the main causes of biodiversity loss in aquatic ecosystems is instream habitat change associated with landâuse change in the drainage basin. Biofuel crop production is an increasingly important driver of landâuse change in existing agricultural drainage basins. Conceptually, biofuels such as sugarcane (Saccharum spp.: Poaceea) can provide a sustainable alternative to fossil fuels, but little is known about the consequences of biofuel crop production for biodiversity. Thus, our aim was to investigate if and how the degree of further environmental changes at regional and local scales can influence taxonomic and functional structure of fish assemblages in agroecosystem streams. We quantified drainage basin land use, instream and riparian habitat, and fish assemblages in 38 agroecosystem streams in Brazil with drainage basins experiencing rapid expansion of sugarcane production, and calculated degree of environmental change and corresponding response in taxonomic and functional structure of stream fish assemblages. Procrustes and redundancy analyses tested for correlation between land use and instream habitat and environmental factors correlated with fish assemblage structure, respectively. Previous studies demonstrated relationships between landâuse change, instream habitat change and taxonomic and functional structure of stream fish assemblages. Therefore, we used regression to test the hypothesis that degree of environmental change is positively correlated with magnitude of change in taxonomic and functional structure of fish assemblages. Primary gradients of environmental change included conversion of pasture to sugarcane and reduction of stream width, depth and volume. Although drainage basin and instream attributes were not correlated within a year, we detected a legacy effect of land use on instream habitat. The degree of environmental change was not significantly correlated with taxonomic or functional changes in stream fish assemblages in most cases. However, abundances of resistant taxa increased, whereas nektonic functional groups decreased, and the biological response also presented evidence of a legacy effect. Our findings demonstrate that instream habitat and aquatic biodiversity in streams with agricultural drainage basins undergoing rapid conversion to biofuel production likely will not experience the full magnitude of responses in the short term. Therefore, repeated sampling of sufficient duration to account for legacy effects or time lags is needed to test for effects of biofuel expansion on biodiversity, and similarly to assess whether management practices such as riparian zone preservation can benefit biodiversity in agroecosystems.
Keywords	Saccharum ; agroecosystems ; aquatic ecosystems ; biodiversity ; biofuels ; correlation ; crop production ; energy crops ; environmental factors ; fish ; fossil fuels ; fuel production ; habitats ; land use change ; moieties ; nekton ; pastures ; riparian areas ; streams ; sugarcane ; watersheds ; Brazil
Language	English
Dates of publication	2017-12
Size	p. 2026-2038.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	121180-8
ISSN	0046-5070
ISSN	0046-5070
DOI	10.1111/fwb.13047
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: A multimetric index based on fish fauna for the evaluation of the biotic integrity of streams at a mesohabitat scale Índice multimétrico com base na fauna de peixes para avaliação da integridade biótica de riachos em escala de meso-hábitat

Lilian Casatti / Fabrício Barreto Teresa

Acta Limnologica Brasiliensia, Vol 24, Iss 4, Pp 339-

2012 Volume 350

Abstract: AIM: In this study, we evaluated the ability of the Index of Biotic Integrity (IBI), based on fish fauna, to discriminate between reference streams and degraded streams at a mesohabitat scale. METHODS: We sampled the ichthyofauna of 96 mesohabitats (runs, ...

Abstract	AIM: In this study, we evaluated the ability of the Index of Biotic Integrity (IBI), based on fish fauna, to discriminate between reference streams and degraded streams at a mesohabitat scale. METHODS: We sampled the ichthyofauna of 96 mesohabitats (runs, riffles and pools) with electrofishing gear in six streams (three reference and three degraded) of comparable volume, width, and depth. Twelve attributes were tested separately for different mesohabitat types. RESULTS: Ten of the metrics tested were used to obtain the IBI for runs, six for riffles and ten for pools. The IBI indicated poor conditions for runs and riffles and very poor conditions for pools. CONCLUSIONS: These results indicate that the IBI may be useful for distinguishing among environments with contrasting conservation status at a mesohabitat scale. Differences were obtained not only in the sets of metrics valid for each mesohabitat but also in the final scores and rankings of the mesohabitat types assessed. These results emphasize the importance of considering the structural and biological variability of aquatic environments to capture the significance of losses of integrity due to human influence. OBJETIVO: Neste estudo avaliamos se o Índice de Integridade Biótica (IBI) elaborado com base na ictiofauna é capaz de discriminar locais referência dos degradados em uma escala de meso-hábitat. MÉTODOS: A ictiofauna de 96 meso-hábitats (corredores, corredeiras e poços) foi amostrada em seis riachos (três referência e três degradados) de volume, largura e profundidade comparáveis, por meio de pesca elétrica. Doze atributos biológicos foram testados, considerando os meso-hábitats separadamente. RESULTADOS: Dez métricas compuseram o IBI para corredores, seis para corredeiras e dez para poços, indicando condições pobres para corredores e corredeiras e muito pobres para poços. CONCLUSÕES: Esses resultados indicam que o IBI aplicado em uma escala de meso-hábitat pode representar uma ferramenta útil para discriminar ambientes em estado de conservação ...
Keywords	ictiofauna ; qualidade do hábitat ; conservação ; IBI ; monitoramento biológico ; ichthyofauna ; habitat quality ; conservation ; biological monitoring ; Ecology ; QH540-549.5
Language	English
Publishing date	2012-12-01T00:00:00Z
Publisher	Associação Brasileira de Limnologia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: First record of Arapaima gigas (Schinz, 1822) (Teleostei

Fernando Carvalho / Lilian Casatti / Angelo Manzotti / Délcero Ravazzi

Check List, Vol 11, Iss 5, Pp 1-

Osteoglossomorpha), the “pirarucu”, in the upper Paraná River basin, Southeast Brazil

2015 Volume 4

Abstract: Arapaima gigas (Schinz), the “pirarucu”, is one of largest freshwater fish of the Neotropical region, naturally occurring in the Amazon, Essequibo, and Orinoco river basins. Herein, it is first recorded from the Grande River, in the upper Paraná River ... ...

Abstract	Arapaima gigas (Schinz), the “pirarucu”, is one of largest freshwater fish of the Neotropical region, naturally occurring in the Amazon, Essequibo, and Orinoco river basins. Herein, it is first recorded from the Grande River, in the upper Paraná River basin. This record is based on the finding of one dead specimen on the left margin of the Grande River, and in situ observation of juveniles and adults in the river.
Keywords	Biology (General) ; QH301-705.5
Language	English
Publishing date	2015-09-01T00:00:00Z
Publisher	Pensoft Publishers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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