Effects of spatial distance, physical barriers, and habitat on a stream fish metacommunity

Mozzaquattro, Laís Bohrer; Dala‐Corte, Renato Bolson; Becker, Fernando Gertum; Melo, Adriano S.

doi:10.1007/s10750-020-04309-8

Cited by 22 publications

(21 citation statements)

References 48 publications

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“…As in many metacommunity studies, the variation explained by matrices of correlates was low compared to the unexplained fraction (e.g., Algarte et al, 2014;Mozzaquattro et al, 2020; in our study most variation also remained in the unexplained portion, see Fig. 3).…”

Section: Discussionsupporting

confidence: 56%

Metacommunity of a host metapopulation: explaining patterns and structures of a fish parasite metacommunity in a Neotropical floodplain basin

et al. 2021

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Host-parasite metacommunities are influenced by a myriad of factors, although little is known about which processes affect this relationship at different scales. Here, we tested how local habitat characteristics and host traits explained the parasite metacommunity of a migratory fish in a large Brazilian river floodplain. The parasite metacommunity structure showed a Clementsian pattern, which indicates a more deterministic assembly pattern, in accordance with partial Redundancy Analysis results. Results indicated that species filtering is the predominant mechanism driving community assembly. Patterns were clearer in the dry season of the floodplain. Environmental determinism seems to explain ectoparasite metacommunities in the dry season, in contrast with endoparasites that were more correlated to host traits. Overall, our results indicated that ectoparasitism is an interaction marked by opportunity, whereas endoparasitism is likely related to host features. Thus, we argue that metacommunity structuring of parasites depends on the infection strategy. Our results show that floodplain dynamics are central not only for freeliving animal organizations but also for symbiotic interactions. Here, we highlight the importance of understanding the factors influencing the distribution Handling editor: Antti P. Eloranta

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Section: Discussionsupporting

confidence: 56%

Metacommunity of a host metapopulation: explaining patterns and structures of a fish parasite metacommunity in a Neotropical floodplain basin

et al. 2021

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“…Caetano et al (2021) showed that steep Neotropical stream assemblages were nested, containing a subset of fish species and traits of the fish metacommunity present in streams with gentle slopes. Slope affects fish diversity patterns by driving other abiotic features at larger scales, such as geomorphology, hydrology, dispersal, and the persistence of species (Eros et al, 2011;Mozzaquattro et al, 2020). Steep average catchment gradients together with high rainfall in the upper basin in our study system influences stream geomorphology and hydrodynamics, often on a daily basis.…”

Section: Taxonomic Spatial Nestednessmentioning

confidence: 94%

Functional diversity of afrotropical fish communities across river gradients in the Republic of Congo, west central Africa

Walsh

Pease

Woodford

et al. 2022

Front. Environ. Sci.

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Characterizing functional freshwater biodiversity patterns and understanding community determinants can aid in predicting changes and prioritizing specific conservation management actions. Afrotropical freshwater systems support diverse ecological communities, including many taxonomically undescribed species, yet few studies have been undertaken in this region and they remain poorly understood. Here, we use functional trait-based approaches to describe the functional diversity of fish assemblages in the Republic of Congo (west Central Africa) from the headwaters of a large basin (upper basin) to the coastal plains (lower basin). Functional traits were assessed using multivariate ordination, and functional diversity was calculated using functional trait-space occupation. We investigated if fish β diversity is nested regionally and at a basin-scale to understand if species assemblages exhibit non-random or environmental filtering patterns. Trait-environment relationships were modeled to determine the most significant drivers of trait diversity, and functional richness (FRic) was calculated for communities in both basins to identify whether Afrotropical systems conform to expected patterns of biodiversity along a fluvial gradient. Moderate to weak community nestedness and various traits associated with resistance and feeding were significantly correlated with habitat variables in the upper and lower basins respectively. Whilst environmental filtering is an important process of community assembly at basin scale, non-random processes are evident in the upper basin, whereas a high turnover was noted in the lower basin. Trophic traits in larger coastal plain habitats of the lower basin suggest higher trophic diversity is associated with higher spatial heterogeneity and nutrient concentrations. High functional turnover between headwaters and coastal plains suggests different functional strategies in fish assemblages between localities along the fluvial gradient. In contrast to expectations derived from temperate lotic systems, functional richness was comparable across both basinswhich suggests that headwater zones in the region harbor substantial functional diversity, especially when considering upstream catchment size. Functional diversity and environment patterns documented show unique patterns of functional richness that may assist in improving understanding of responses, vulnerabilities and conservation needs in Afrotropical systems.

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“…The stream/outlet distance raster files are listed in Table 4. Both euclidean ("as-the-crow-flies") and dendritic ("asthe-fish-swims") stream distance metrics along the network are widely implemented in spatial species distribution modelling, with the latter metric being more effective in modelling the dispersal of aquatic organisms (Mozzaquattro et al, 2020;Altermatt, 2013;Grant et al, 2007). Moreover, stream distance metrics are essential for calculating sediment delivery ratios (Walling, 1983).…”

Section: Stream Distancementioning

confidence: 99%

“…For example, flow accumulation has been utilised in flood susceptibility mapping models, and often serves as a proxy for discharge in ecological modelling (Shafizadeh-Moghadam et al, 2018;Kuemmerlen et al, 2014). Flow direction has been used in metacommunity structure studies (Mozzaquattro et al, 2020), whereas drainage basins and sub-catchments can be used as the spatial units in species distribution modelling (Altermatt et al, 2013;Read et al, 2015). The Hydrography90m products can provide fundamental information for modelling the high-resolution supply and demand of biogeochemically relevant constituents that, so far, have been modelled using hydraulic information derived from low-resolution datasets (Raymond et al, 2016;Wollheim et al, 2018).…”

Section: Applicationsmentioning

confidence: 99%

Hydrography90m: A new high-resolution global hydrographic dataset

Amatulli

Márquez

Sethi³

et al. 2022

Preprint

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Abstract. The geographic distribution of streams and rivers drives a multitude of patterns and processes in hy-drology, geomorphology, geography and ecology. Therefore, a hydrographic network that accurately delineatesboth small streams and large rivers with equal precision, along with their topographic and topological proper-ties, would be indispensable in the earth sciences. However, no such hydrographic study has been publishedto date. Perhaps equally critical is the absence of small headwater streams in global hydrographies, as theseare estimated to contribute to more than 70 % of overall stream length. We aimed to fill this gap by using theMERIT Hydro Digital Elevation Model at 3 arc-sec (∼90 m at the equator) to derive a globally seamless, stan-dardised hydrographic network, the "Hydrography90m", with corresponding stream topographic and topologicalinformation. A central feature of the network is the minimal upstream contributing area, i.e. flow accumulation,of 0.05 km2 (or 5 ha) to initiate a stream channel, which allowed us to extract headwater stream channels ingreat detail. By employing a suite of GRASS GIS hydrological modules, we calculated the range-wide upstreamflow accumulation and flow direction to delineate a total of 1.6 million drainage basins, and extracted globallya total of 726 million unique stream segments with their corresponding sub-catchments. In addition, we com-puted stream topographic variables comprising stream slope, gradient, length, and curvature attributes, as wellas stream topological variables to allow for network routing and various stream order classifications. We vali-dated the spatial accuracy and flow accumulation of Hydrography90m against NHDPlus HR, an independent,national high-resolution hydrographic network dataset of the United States. Our validation shows that the newlydeveloped Hydrography90m has the highest spatial precision, and contains more headwater stream channelscompared to three other global hydrographic datasets. This inclusive approach provides a vital, and long-overduebaseline for assessing actual streamflow in headwaters, and opens new research avenues for high-resolution stud-ies of surface water worldwide. Hydrography90m thus offers significant potential to facilitate the assessment offreshwater quantity and quality, inundation risk, biodiversity and conservation, as well as resource managementobjectives in a globally comprehensive and standardised manner. We provide all the computed layers for visual-isation and download in 20° × 20° tiles at https://public.igb-berlin.de/index.php/s/od7neyLcYgi5qRp. While the entire dataset can be used directly in standard GIS applications, we recommend its seamless integration with hydrological modules in open-source QGIS and GRASS GIS software to further customise the data and derive optimal utility from it.

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Effects of spatial distance, physical barriers, and habitat on a stream fish metacommunity

Cited by 22 publications

References 48 publications

Metacommunity of a host metapopulation: explaining patterns and structures of a fish parasite metacommunity in a Neotropical floodplain basin

Metacommunity of a host metapopulation: explaining patterns and structures of a fish parasite metacommunity in a Neotropical floodplain basin

Functional diversity of afrotropical fish communities across river gradients in the Republic of Congo, west central Africa

Hydrography90m: A new high-resolution global hydrographic dataset

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