Water as Capital and Its Uses in the Caatinga

Andrade, Eunice Maia de; Aquino, Deodato do Nascimento; Chaves, Luiz Carlos Guerreiro; Lopes, Fernando Bezerra

doi:10.1007/978-3-319-68339-3_10

Cited by 39 publications

(26 citation statements)

References 34 publications

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“…The unplanned use of plowing and harrowing on cultivated land stimulates the oxidation of organic matter and degradation of the soil structure [7,14]. In SDTF, this process is more intense due to the ready availability of solar energy and uncertainty of rainfall-the predominant hot semi-arid climate is characterized by a poor temporal and spatial distribution of rainfall [15], with a frequent occurrence of both dry years and consecutive dry days during the rainy season.…”

Section: Introductionmentioning

confidence: 99%

Land-Use Effect on Soil Carbon and Nitrogen Stock in a Seasonally Dry Tropical Forest

et al. 2020

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Total organic carbon (TOC) and total nitrogen (TN) concentration in the soil are an indicator of soil degradation. To understand how land-use may impact these concentrations in seasonally dry tropical forests (SDTF), we analyzed the effect of four land-uses on TOC stocks (STK.TOC) and TN stocks (STK.TN) in a semi-arid region of Brazil. Soil samples were collected in 12 trenches (three sites × four land-uses—dense caatinga (DC), open caatinga (OC), pasture (PA) and agriculture (AG)), in the 0–10; 10–20 and 20–30 cm layers or as far as the bedrock. The data were compared by the Kruskal–Wallis test (p ≤ 0.05) and similarity investigated by cluster analysis. STK.TOC and STK.TN the surface layer (0–10 cm) showed no significant difference (p ≤ 0.05) between the DC; OC and PA land-uses. The similarity in STK.TOC and STK.TN values between DC, OC and PA, indicate that it is possible to explore SDTF to produce biomass and protein by adopting open caatinga and pasture land uses on Neosols with very low TOC stocks. The greatest reduction in STK.TOC and STK.TN in the agriculture land-use may lead to soil degradation and contribute to the addition of CO2 to the atmosphere.

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Section: Introductionmentioning

confidence: 99%

Land-Use Effect on Soil Carbon and Nitrogen Stock in a Seasonally Dry Tropical Forest

et al. 2020

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“…In this region, which hosts the largest seasonally dry tropical forest in the world (Fig. 1; Pennington et al 2009), pronounced rainfall seasonality (Nimer 1972, Andrade et al 2017) strongly influences arthropod abundance (Vasconcellos et al 2010, Franc ßa et al 2020 and acts as a cue to set the timing and intensity of bird breeding and moulting (Cavalcanti et al 2016. The observed decrease in the number of records of Xenopsaris in the Caatinga between April and November is congruent with both rainfall seasonality (Fig.…”

Section: Discussionmentioning

confidence: 65%

“…2009), pronounced rainfall seasonality (Nimer 1972, Andrade et al . 2017) strongly influences arthropod abundance (Vasconcellos et al . 2010, França et al .…”

Section: Discussionmentioning

confidence: 99%

Unmasking complex migration syndromes and seasonal plumage colouration in the White‐naped Xenopsaris (Xenopsaris albinucha)

Lima

Lees

2021

Ibis

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The White-naped Xenopsaris Xenopsaris albinucha is an uncommon suboscine passerine with a disjunct distribution extending from Venezuela to the Southern Cone of South America. The ornithological literature concerning this species contains contradictory claims about potential migratory movements, although most authors consider it to be sedentary. In addition, observations of the species exhibiting a mix of male-and femalelike plumage during the non-breeding season have raised the hypothesis that it may undergo seasonal colour changesa trait often associated with migratory behaviour and seemingly uncommon in Neotropical birds. Here we use citizen science and museum specimen data to interrogate the hypotheses of migratory behaviour and seasonal phenotypic variation in the species. We found evidence for three disjunct breeding populations, of which one is resident, one is apparently partially migratory and one is fully migratory, with birds from the last two populations coming into contact during the nonbreeding season. We also found evidence for seasonal variation in the species' plumage colouration. Our results suggest that the White-naped Xenopsaris has both resident and migratory populations and exhibits an eclipse plumage, and highlight the value of citizen science data to study seasonal variation in plumage colouration.

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“…Soils are mostly of Pre‐Cambrian origin, nutrient‐rich, stony and shallow, while sandy soils of sedimentary origin are deep and nutrient‐poor, but they cover a relatively small fraction (~30%) of the Caatinga region (Moro et al, 2016). The Caatinga dry forest encompasses a wide variation in precipitation regimes, mostly from 400 to 1200 mm/year, with up to 70% of the annual precipitation concentrated into a single month (see Andrade et al, 2017, for further detail on precipitation regimes). Average annual temperature ranges from 19°C in the southern Caatinga to 28°C in the northern and eastern portions (Silva & Souza, 2018).…”

Section: Methodsmentioning

confidence: 99%

Cross‐scale drivers of woody plant species commonness and rarity in the Brazilian drylands

Pinho

Trindade

Peres

et al. 2022

Diversity and Distributions

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Aim Locally abundant species are typically widespread, while locally scarce species are geographically restricted—the so‐called abundance‐occupancy relationships (AORs). AORs help explain the drivers of species rarity and community assembly, but little is known about how variation around such relationship is driven by species traits and niche‐based processes, particularly in tropical woody plants. We tested the hypothesis that AORs in tropical dryland woody plants are positive and mediated by niche and functional traits along environmental gradients. Location The Caatinga dry forest and Cerrado savannah, Brazil. Methods We aggregated abundance and occurrence data into grid‐cells representing local (10‐km) to landscape scales (50‐km). We calculated species mean relative abundance at occupied grid‐cells (local abundance) and the proportion of grid‐cells occupied (occupancy), and estimated their niche breadth and marginality along multivariate environmental gradients. Results AORs were positive but weak at different scales in both regions due to some locally abundant but geographically restricted species, with most species being both locally and geographically rare. Cross‐species variation in local abundance was largely unpredictable, but occupancy was strongly driven by niche and functional traits, with a prominent negative effect of niche marginality. Geographically restricted species were associated with rare habitats, such as wetter and less intensively used habitats. Large seeds and abiotic dispersal favoured occupancy in Caatinga at small and large spatial scales, respectively, whereas species with conservative leaves were more widespread across scales in Cerrado. Main conclusions Woody plants in dry tropical biotas exhibit weak AORs, a pattern likely related to low habitat availability and dispersal limitation. Caatinga and Cerrado biotas emerge as environmentally structured at multiple spatial scales, with several habitat‐specialist rare species bearing specific regenerative and resource‐use traits and relying on conditions threatened by climate change and land‐use intensification. Examining AORs through the lens of niche, functional traits and spatial scales enables mapping patterns and drivers of species commonness and rarity, enhancing understanding of species assembly and providing tools for biodiversity conservation.

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Water as Capital and Its Uses in the Caatinga

Cited by 39 publications

References 34 publications

Land-Use Effect on Soil Carbon and Nitrogen Stock in a Seasonally Dry Tropical Forest

Land-Use Effect on Soil Carbon and Nitrogen Stock in a Seasonally Dry Tropical Forest

Unmasking complex migration syndromes and seasonal plumage colouration in the White‐naped Xenopsaris (Xenopsaris albinucha)

Cross‐scale drivers of woody plant species commonness and rarity in the Brazilian drylands

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