Biodiversity Data Journal :
Research Article
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Corresponding author: Jhenifer Simões Santos (jhenifeersantoos@gmail.com)
Academic editor: Ben Price
Received: 26 May 2020 | Accepted: 04 Jul 2020 | Published: 14 Jul 2020
© 2020 Jhenifer Santos, Luciano Wolff, Lucíola Baldan, Ana Guimarães
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Santos JS, Wolff LL, Baldan LT, Guimarães ATB (2020) Seasonal records of benthic macroinvertebrates in a stream on the eastern edge of the Iguaçu National Park, Brazil. Biodiversity Data Journal 8: e54754. https://doi.org/10.3897/BDJ.8.e54754
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Background
Iguaçu National Park (INP) is known worldwide due to Iguaçu Waterfalls, being considered a World Natural Heritage by UNESCO. The INP is one of the last large forested extensions of inland Brazil that provides protection to the Atlantic Forest, one of the world’s biodiversity hotspots. However, its Natural Heritage status has been threatened by the construction and operation of the Baixo Iguaçu dam, agricultural and urban impacts on its boundaries and the increasing interest of the Brazilian government in re-opening of the “Colono road”, an old illegal road that crossed the interior of the park. Indeed, since benthic macroinvertebrates have been widely used for the environmental assessment of streams, records and abundance of their taxa under different seasonal periods may provide an additional dataset for biomonitoring of hydrographic systems in the face of current anthropogenic impacts on the INP boundaries and other similar streams on forest edges.
New information
In this study, we improved the sampling design of benthic macroinvertebrates and provided seasonal records covering distinct precipitation/temperature periods between 2016 and 2017 of a stream on the eastern edge of the Iguaçu National Park, Brazil. The records total 2,840 individuals distributed in 88 different taxa. The most abundant taxa were the Diptera subfamilies, Chironominae (n = 1,487) and Tanypodinae (n = 256), besides the Heterelmis genus (n = 152, Elmidae; Coleoptera). Diptera was the richest order in number of families (n = 8), while Leptophlebiidae (Ephemeroptera) was the richest taxonomic family in number of genera (n = 11). Aegla (Crustacea) and the Insecta genera, Heterelmis, Hexacylloepus, Noelmis, Phylloicus and Thraulodes, were recorded through all samplings. Twenty-five genera of Ephemeroptera, Plecoptera, Trichoptera (EPT) and Odonata were recorded during intermediate precipitation/temperature periods. Twenty-one of them were recorded in May 2016, with five genera standing out in abundance (Hydrosmilodon, Anacroneuria, Argia, Coryphaeschna, Americabaetis) and four (Needhamella, Tikuna, Simothraulopsis, Neocordulia) in December 2016. Four general taxa were exclusive of the lower precipitation/temperature period (August 2016), standing out in abundance were the Oxystigma (Odonata) and Corydalus (Megaloptera) genera. In March 2017 (higher precipitation/temperature period), four exclusive taxa were recorded, amongst them, the Chimarra (Trichoptera) genus. Furthermore, seasonal records demonstrated higher occurrences and abundance of macroinvertebrates during the intermediate and lower precipitation/temperature periods, besides a varied taxa composition throughout the year, with the presence of both sensitive and tolerant groups to environmental impacts. Our findings suggest that the number and composition of the local-stream macrobenthic fauna were influenced by the seasonal climatic regime. These changes should be considered in the limnological monitoring developed on the hydrographic systems of INP eastern edges to improve the assessment of environmental quality under different local seasonal conditions.
Macroinvertebrates records, biodiversity, aquatic insects, seasonal precipitation, INP, forest edge stream, surrounding management
Behind the scenic beauty provided by the Waterfalls, the Iguaçu National Park (INP) represents the largest forest remnant in southern Brazil for biodiversity protection of the inland Atlantic Forest, one of the most biodiverse and threatened biomes (
Despite internal conservation, INP’s Natural Heritage status, granted by UNESCO in 1986, has been threatened by the construction and operation of the Baixo Iguaçu dam (
Regarding the hydrography, the INP stands out for hosting the unique entirely preserved hydrographic basin of Paraná State, the Floriano River basin. Other micro-basins, such as those of Silva Jardim and São João Rivers, which flow across the park, are partially preserved (
Benthic macroinvertebrates constitute a polyphyletic clustering of organisms, which colonise bottom substrates and dwell part or the whole of their lifetimes in aquatic ecosystems (
In this context, seasonal records of benthic macroinvertebrates, along with measurements of water physicochemical parameters in local hydrographic systems, can contribute to the upgrading of INP’s limnological monitoring programme. This programme is a condition imposed by the ICMBio (environment sector responsible by the INP administration) for the Baixo Iguaçu dam operation. Therefore, the monitoring may identify livestock activities and dumping of wastewater or even the dam impacts on Iguaçu River’s tributaries (
Seasonal climatic changes may indirectly affect the abundance of benthic macroinvertebrates on their habitat-substrates. For example, rainiest periods cause additional runoff and increasing river discharge, which may intensify macroinvertebrates drifting (
The INP region and the western part of Paraná State has a history of changes, over the annual period, for their precipitation and temperature regimes. There is no extreme drought or flooding, but a contrast between periods of lower and higher rainfall/temperature, alternated by transitory climatic conditions (
In the face of that, we provide seasonal records of benthic macroinvertebrates between 2016 and 2017 in a stream on the eastern edge of the Iguaçu National Park, southern Brazil. The Jumelo Stream is one of the sampling sites of a broader project that aims to understand the ecology of macroinvertebrates in rural and forested streams in the region. In this sense, we also recorded the water physicochemical parameters and the taxon abundance categories that may contribute to a local limnological monitoring programme. Our purpose was to discuss seasonal records in an associative way with the habitat characteristics and environmental sensitivity of macroinvertebrates. Implications of the surrounding management were also discussed for effective conservation of macroinvertebrates in local stream systems.
Sampling was carried out between May 2016 and March 2017, comprising periods of intermediate precipitation and decreasing temperature (May 2016); lower precipitation and temperature (August 2016); higher precipitation and increasing temperature (December 2016) and higher precipitation and temperature (March 2017) for the region (Fig.
Climatic regime for the Jumelo Stream region.
Sampling of macroinvertebrate fauna was carried out in triplicate on the following substrate categories: fine (sand/clay < 5 mm and gravel of 5-15 mm in diameter), coarse (pebbles of 25-50 mm and cobbles > 50 mm) and leaf litter (leaves and branches of riparian vegetation). Collection was performed using a Surber sampler (0.5 mm mesh), totalling 36 samples. The sampling design attempted to distance the samples more than 5 m from each other, thus providing seasonal records with greater dataset independence. The entire sampling process and laboratory procedures performed with macroinvertebrates are in accordance with the methodology described in the protocol for sampling and preparing benthic macroinvertebrates samples (
Water physical and chemical parameters were measured at each substrate category of sampling. The data obtained by a multiparameter equipment for water analysis (HORIBA®) were: pH (hydrogen potential), water temperature (oC), conductivity (µS.cm-1), turbidity (NTU), dissolved oxygen (mg.l-1) and total dissolved solids (ml.l-1). To verify significant variations amongst the sampling periods in the water physical and chemical variables, a One-way ANOVA was performed. Subsequently, the HSD-Tukey multiple comparison test was applied to determine which averages differed. Analysis were performed on the software Statistica 7.0 (
The most variations in the water physical and chemical parameters were found for water temperature, which increased significantly from May 2016 to March 2017 (Table
Mean ± standard deviation of Jumelo Stream water physical and chemical parameters. DO = dissolved oxygen. Asterisks indicate significance and equal letters indicate statistical similarity amongst seasons. F de Snedecor of One-way ANOVA.
May/2016 | Aug/2016 | Dec/2016 | Mar/2017 | F(3,32) | p-value | |
Temperature (°C) | 15.75 ± 0.05d | 19.04 ± 0.37c | 20.31 ± 0.17b | 20.76 ± 0.16a | 824.00 | < 0.0001* |
DO (mg.l-1) | 9.75 ± 0.29a | 8.43 ± 1.16b | 8.47 ± 0.85b | 9.26 ± 0.87ab | 5.06 | 0.006* |
pH (hydrogen potential) | 7.24 ± 0.14b | 6.82 ± 0.35c | 6.87 ± 0.49bc | 8.00 ± 0.18a | 26.11 | < 0.0001* |
Conductivity (µS.cm-1) | 0.0287 ± 0.005c | 0.034 ± 0.002ab | 0.032 ± 0.003bc | 0.035 ± 0.0005a | 8.95 | 0.0002* |
Turbidity (NTU) | 11.27 ± 2.40b | 13.45 ± 0.74a | 9.06 ± 1.08c | 10.29 ± 0.39bc | 16.27 | < 0.0001* |
Total solids (ml.l-1) | 0.019 ± 0.003b | 0.022 ± 0.001a | 0.02 ± 0.001ab | 0.23 ± 0.00a | 8.22 | < 0.0001* |
A total of 2,840 macroinvertebrate individuals were collected, comprising 88 different taxa in five phyla, six classes, 17 orders/suborders, 46 families/subfamilies and 57 genera (Table
Macroinvertebrates records of the Jumelo Stream, eastern edge of the Iguaçu National Park. Abundance classes correspond to: Very low (VL; 1-5), low (L; 6-10), medium (M; 11-50), high (H; 51-100) and very high (VH; > 100) captured individuals.
Phylum/ Class |
Order/ Suborder |
Family/ Subfamily |
Genus |
May 2016 |
Aug 2016 |
Dec 2016 |
Mar 2017 |
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Platyhelminthes Turbellaria |
Tricladida | Dugesiidae | VL | ||||
Nematomorpha | VL | ||||||
Mollusca Bivalvia |
Veneroida | Sphaeriidae | VL | ||||
Annelida Oligochaeta |
Haplotaxida | Naididae | M | M | L | M | |
Annelida Hirudinea |
Rhynchobdellida | Glossiphoniidae | VL | VL | |||
Arthropoda Malacostraca |
Decapoda | Aeglidae | Aegla | M | M | M | M |
Atyidae | VL | ||||||
Amphipoda | VL | ||||||
Arthropoda Insecta |
Collembola | Entomobryidae | VL | VL | |||
Ephemeroptera | Baetidae | L | |||||
Americabaetis | VL | VL | |||||
Baetodes | L | VL | VL | ||||
Camelobaetidius | VL | VL | |||||
Cloeodes | VL | VL | L | ||||
Cryptonympha | VL | VL | |||||
Moribaetis | VL | ||||||
Caenidae | Caenis | VL | VL | VL | |||
Leptohyphidae | Leptohyphes | VL | |||||
Traverhyphes | VL | ||||||
Tricorythodes | VL | ||||||
Leptophlebiidae | VL | ||||||
Farrodes | VL | VL | |||||
Hagenulopsis | VL | ||||||
Hydrosmilodon | L | ||||||
Hylister | L | VL | |||||
Massartella | VL | VL | VL | ||||
Meridialaris | VL | ||||||
Miroculis | L | VL | VL | ||||
Needhamella | VL | ||||||
Simothraulopsis | VL | ||||||
Thraulodes | VL | VL | VL | L | |||
Tikuna | VL | ||||||
Odonata Anisoptera |
Aeshnidae | VL | VL | ||||
Coryphaeschna | VL | ||||||
Corduliidae |
Neocordulia | VL | |||||
Gomphidae |
VL | VL | |||||
Progomphus | M | VL | VL | ||||
Cacoides | VL | ||||||
Agriogomphus | VL | ||||||
Gomphoides | VL | VL | |||||
Phyllocycla | VL | ||||||
Libellulidae | VL | ||||||
Perithemis | VL | ||||||
Anatya | VL | ||||||
Brechmorhoga | VL | ||||||
Macrothemis | VL | ||||||
Odonata Zygoptera | VL | ||||||
Calopterygidae | Mnesarete | VL | |||||
Coenagrionidae | Argia | L | |||||
Megapodagrionidae | L | ||||||
Heteragrion | M | VL | |||||
Oxystigma | M | ||||||
Plecoptera | Gripopterygidae | Gripopteryx | VL | ||||
Paragripopteryx | L | M | VL | ||||
Tupiperla | M | VL | M | ||||
Perlidae | Anacroneuria | L | |||||
Megaloptera | Corydalidae | Corydalus | VL | ||||
Coleoptera | Curculionidae | VL | |||||
Dytiscidae | VL | VL | VL | ||||
Elmidae | Heterelmis | H | M | M | M | ||
Hexacylloepus | M | M | L | VL | |||
Macrelmis | VL | VL | VL | ||||
Microcylloepus | VL | ||||||
Noelmis | VL | VL | VL | VL | |||
Phanocerus | VL | ||||||
Hydrophilidae | VL | ||||||
Lutrochidae | Lutrochus | VL | VL | VL | |||
Psephenidae | M | VL | L | VL | |||
Ptilodactylidae | VL | ||||||
Lepidoptera | Crambidae | VL | |||||
Trichoptera | Calamoceratidae | Phylloicus | M | VL | L | VL | |
Ecnomidae | Austrotinodes | VL | |||||
Hydrobiosidae | Atopsyche | VL | |||||
Hydropsychidae | Macronema | VL | M | ||||
Smicridea | M | L | |||||
Leptoceridae | Nectopsyche | VL | VL | VL | |||
Oecetis | VL | VL | |||||
Philopotamidae | Chimarra | VL | |||||
Diptera | Ceratopogonidae | L | VL | VL | VL | ||
Chironomidae Chironominae | VH | VH | VH | M | |||
Chironomidae Orthocladiinae | M | M | M | ||||
Chironomidae Tanypodinae | H | M | VH | L | |||
Empididae | L | VL | VL | VL | |||
Muscidae | VL | ||||||
Psychodidae | VL | VL | |||||
Simuliidae | M | L | L | L | |||
Stratiomyidae | VL | ||||||
Tipulidae | VL |
Six genera were common to the four sampling periods (Aeglidae: Aegla; Elmidae: Heterelmis, Hexacylloepus, Noelmis; Calamoceratidae: Phylloicus; Leptophlebiidae: Thraulodes) (Table
Chironomidae was the most abundant family collected, as found in other aquatic systems (
Diptera, Coleoptera, Odonata and Trichoptera were the richest orders in number of families. These orders are typical in studies of benthic macroinvertebrates (
Leptophlebiidae (Ephemeroptera) was the richest family in number of genera. Thraulodes was recorded in all samplings and showed preference for coarse substrate, according to
Trichoptera are sensitive to impacts and were also amongst the richest in number of families. Hydropsychidae presented two genera. Smicridea was more abundant than Macronema and exclusive in intermediate and lower precipitation/temperature periods. Corroborating
Odonata is amongst the most tolerant macroinvertebrates. Progomphus (Gomphidae), recorded in intermediate and higher precipitation/temperature periods, is adapted to burrowing itself into sandy substrate where it ambushes prey (
In general, although there is no temporal replication to test predictions, macroinvertebrates records were higher in intermediate and lower precipitation/temperature periods. On the other hand, only 26 general taxa occurred in higher precipitation/temperature period (March 2017), which corroborate this exploratory study with the hypothesis of seasonal influences of other authors (
The high number of taxa, many of them being sensitive to impacts, highlights the importance of the INP forested areas. Since the right margin is preserved, it provides a mosaic of microhabitat environments in the Jumelo Stream, which support multiple taxa with different levels of sensitivity and habitat preferences. Therefore, it is relevant that terrestrial units of conservation are seen with their potential to extend their conservation objectives to freshwater systems (
The dataset indicated a diverse fauna, composed of 88 different taxa, with distinct levels of environmental sensitivity. Seasonal records showed higher occurrences, abundance and exclusivities in intermediate and lower precipitation/temperature periods. Lower records in the higher precipitation period (March 2017) may be associated with increased run-off and consequent macroinvertebrates drifting. These findings highlight the importance of the INP forested areas, as well as drawing attention to the need for an adequate management of its surroundings and edges. For the Jumelo Stream and other similar streams located at the forest edge, management is necessary to include buffer zones with specific rules and restrictions of land use to reduce local anthropogenic impacts on aquatic biodiversity. Nevertheless, the results indicate the necessity for considering the seasonal effects on the macroinvertebrates fauna to improve the limnological monitoring of the local hydrographic systems, provided in the INP management plan.
Authors are grateful to Western Paraná State University – Campus Cascavel and Federal University of Paraná – Sector Palotina for providing infrastructure. We are also grateful to our colleagues of the Biological Investigations Laboratory Andressa Bach, Melissa Paoletti, João Ricardo V. Assis, Paulo A. D. Forcelini, Julio Cesar C. Jr., Gabriel Augusto P. Souza and the colleagues Jéssica S. Ribeiro and Jaqueline Celante of the Water Quality and Limnology Laboratory - UFPR, who were directly or indirectly involved in the project execution, providing support in field collections, laboratory identification of macroinvertebrates and statistical analysis. We are also grateful to Stephany M. Wharton of Celera Translations Ltda. for the language revision.
Western Paraná State University – Campus Cascavel, Brazil.
The research project, including the sampling design that this study is part of, was conceived by LLW, LTB and ATBG. The three authors along with JSS carried out the fieldwork. The manuscript was drafted by JSS and LLW. JSS and LTB identified the macroinvertebrates. JSS and ATBG analysed the water physical and chemical variables. JSS and LLW wrote the final version of the paper. LTB and ATBG reviewed the previous versions and added intellectual content. All authors read and consented to the final version of the manuscript.
The authors declare that there is no conflict of interest regarding the publication of this manuscript.