Influence of forest cover on in-stream large wood in an agricultural landscape of southeastern Brazil: a multi-scale analysis

Paula, Felipe Rossetti de; Gerhard, Pedro; Wenger, Seth J.; Ferreira, Anderson; Vettorazzi, Carlos Alberto; Ferraz, Sílvio

doi:10.1007/s10980-012-9809-1

Cited by 26 publications

(30 citation statements)

References 44 publications

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“…Although a positive link between forest cover and wood input is not surprising, the influence of catchment level drivers in STM highlights that these effects span multiple scales. These results reflect those of Paula et al (2013), who found that local riparian forests were important sources of instream wood in tropical streams, but also noted the importance of forests along the upstream network riparian zone and the entire upstream catchment because of downstream transport of wood. In addition, our data suggest that a number of other factors are associated with this habitat feature, including mechanized agriculture in STM and road crossings in PGM.…”

Section: Discussionsupporting

confidence: 89%

“…Forest included primary forest (whether undisturbed or showing signs of disturbance from fire or logging), and secondary forest older than 10 years (considered sufficiently developed to provide significant hydrological services based on our expert assessments). To calculate forest cover at different hydrological distances from the stream site as proposed by Paula et al (2013), we first standardized the distances by the maximum distance in each catchment to account for differences in catchment size. Then we assigned all pixels in each catchment into near, intermediate, or distant categories and then calculated the percent forest cover in each of the distance categories (Fig.…”

Section: Landscape Predictor Variablesmentioning

confidence: 99%

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Multi-scale assessment of human-induced changes to Amazonian instream habitats

et al. 2016

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Context Land use change and forest degradation have myriad effects on tropical ecosystems. Yet their consequences for low-order streams remain very poorly understood, including in the worlds largest freshwater basin, the Amazon. Objectives Determine the degree to which physical and chemical characteristics of the instream habitat of low-order Amazonian streams change in response to past local-and catchment-level anthropogenic disturbances.Methods To do so, we collected field instream habitat (i.e., physical habitat and water quality) and landscape data from 99 stream sites in two eastern Brazilian Amazon regions. We used random forest regression trees to assess the relative importance of different predictor variables in determining changes in instream habitat response variables. Results Multiple drivers, operating at multiple spatial scales, were important in determining changes in the physical habitat and water quality of the sites. Although we found few similarities in modelled relationships between the two regions, we observed non-linear responses of specific instream Ecol (2016) 31:1725-1745 DOI 10.1007 characteristics to landscape change; for example 20 % of catchment deforestation resulted in consistently warmer streams.Conclusions Our results highlight the importance of local riparian and catchment-scale forest cover in shaping instream physical environments, but also underscore the importance of other land use changes and activities, such as road crossings and upstream agriculture intensification. In contrast to the propertyscale focus of the Brazilian Forest code, which governs environmental regulations on private land, our results reinforce the importance of catchment-wide management strategies to protect stream ecosystem integrity.

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Section: Discussionsupporting

confidence: 89%

Section: Landscape Predictor Variablesmentioning

confidence: 99%

Multi-scale assessment of human-induced changes to Amazonian instream habitats

et al. 2016

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“…Conservation strategies for aquatic biodiversity in these systems should seek to restore and conserve riparian and landscape diversity (but see a context dependence evaluation by Nislow 2005). Through this way, it is possible to protect instream habitats from siltation (Sweeney and Newbold 2014), provide woody debris for instream habitat (Paula et al 2011(Paula et al , 2013, and mitigate the proliferation of grass on stream banks (Bunn et al 1997). This last goal is the main factor associated with functional redundancy in the studied region.…”

Section: Discussionmentioning

confidence: 99%

More of the Same: High Functional Redundancy in Stream Fish Assemblages from Tropical Agroecosystems

Casatti

Teresa

Zeni

et al. 2015

Environmental Management

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In this study, we investigated the influence of environmental variables (predictor variables) on the species richness, species diversity, functional diversity, and functional redundancy (response variables) of stream fish assemblages in an agroecosystem that harbor a gradient of degradation. We hypothesized that, despite presenting high richness or diversity in some occasions, fish communities will be more functionally redundant with stream degradation. Species richness, species diversity, and functional redundancy were predicted by the percentage of grass on the banks, which is a characteristic that indicates degraded conditions, whereas the percentage of coarse substrate in the stream bottom was an important predictor of all response variables and indicates more preserved conditions. Despite being more numerous and diverse, the groups of species living in streams with an abundance of grass on the banks perform similar functions in the ecosystem. We found that riparian and watershed land use had low predictive power in comparison to the instream habitat. If there is any interest in promoting ecosystem functions and fish diversity, conservation strategies should seek to restore forests in watersheds and riparian buffers, protect instream habitats from siltation, provide wood debris, and mitigate the proliferation of grass on stream banks. Such actions will work better if they are planned together with good farming practices because these basins will continue to be used for agriculture and livestock in the future.

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“…For example, increase infiltration capacity services through restoration practices can be slow and incomplete (Bullock et al 2011). We believe that if recovery actions start to target the forest patches with low potential of service provision, as shown in the balance, it can become a faster way to acquire results for the protection of water resources, and may allow the forest to reach late successional stages (Paula et al 2013). The strategy to be adopted in the study landscape would be the restoration and recovery of forest fragments with low potential of services supply to enhance the availability of services, instead of planting new forests in areas with high demand that will promote a lower supply of services.…”

Section: Resultsmentioning

confidence: 99%

Spatial Assessment of Water-Related Ecosystem Services to Prioritize Restoration of Forest Patches

Cassiano¹,

Ferraz²,

Molin³

et al. 2013

NatCon

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Forests provide several ecosystem services and its presence near streams can increase water quality and quantity. In human--dominated landscapes such as agricultural lands, the forests are usually limited to a few patches. To improve the protection of water ways in these areas, we propose a methodological framework to: (i) assess the contribution of water-related ecosystem services offered by the present forest vegetation in the landscape, and (ii) prioritize areas for recovery and restoration actions. The methodology is based on a balance between local demand (physical variables) and supply (forest characteristics) of water-related services. This balance has the advantage of showing the amount of forest that currently has potential to provide services and the areas with higher deficit of services. Although this method still needs to be validated, its simplicity and easy replicability makes our methodology a rapid assessment of forest potential to provide water-related ecosystem services within agricultural areas.

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Influence of forest cover on in-stream large wood in an agricultural landscape of southeastern Brazil: a multi-scale analysis

Cited by 26 publications

References 44 publications

Multi-scale assessment of human-induced changes to Amazonian instream habitats

Multi-scale assessment of human-induced changes to Amazonian instream habitats

More of the Same: High Functional Redundancy in Stream Fish Assemblages from Tropical Agroecosystems

Spatial Assessment of Water-Related Ecosystem Services to Prioritize Restoration of Forest Patches

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