Pine afforestation changes more strongly community structure than ecosystem functioning in grassland mountain streams

Príncipe, Romina E.; Márquez, Javier A.; Martina, Luciana Cibils; Jobbágy, Estéban G.; Albariño, Ricardo

doi:10.1016/j.ecolind.2015.04.033

Cited by 16 publications

(10 citation statements)

References 64 publications

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“…NGE results on Chl a and AFDM supported the higher grazing effect on grassland substrates compared to the afforestation. In a previous study in the area, Principe et al (2015) proposed that higher grazing in grassland streams and heavy shading by afforestation contributed to the lack of differences in biofilm accrual between both stream types, which is confirmed by our results.…”

Section: Discussionsupporting

confidence: 91%

“…Cibils Martina, Márquez, Principe, Gari, and Albariño (2014) showed that larvae of the Trichoptera Helicopsyche, a common and abundant scraper, exerted greater control on algal communities developed in a grassland stream than when they were grown in an afforested one; they argued that stronger grazing was stimulated by higher periphyton quality (more autotrophic and with higher digestible organic matter) belonging to grassland streams. Principe, Márquez, Cibils Martina, Jobbágy, and Albariño (2015) which performed a 30-day field experiment in the same streams of this study with only grazing-exposed substrates, found that biofilm accrual (i.e., biomass per surface unit and time) was similar between three grassland and three afforested streams. Overall, those results suggest that opposing forces happening in grassland (high light levels plus strong grazing) and pine streams (low light and weak grazing) resulted in similar accrual rates.…”

Section: Introductionmentioning

confidence: 58%

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Disentangling grazing and light controls on algal communities in grassland and afforested streams

Cibils‐Martina

Márquez

Gari

et al. 2019

Ecological Research

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Our aim was to analyze the combined effect of grazing and light on composition, structure, functional diversity (FD) and succession of algal communities in two headwater streams (grassland and pine afforested). We hypothesized that algal communities in the grassland stream are top‐down controlled, as a result of higher grazing; meanwhile, in the afforested stream, algal communities are bottom‐up shaped, mainly due to sunlight reduction. In in situ experiments, we used platforms to avoid grazing in both streams, and the substrates were extracted at 23, 45 and 73 days. Algal community composition was different between stream types. Seventy percent of structural and biomass variables responded to grazing. In the grassland stream, grazing reduced richness and ash‐free dry mass (AFDM), especially after 45 days, while in the afforested stream, at the same time, grazed substrates showed higher richness and AFDM than ungrazed substrates. Net grazing effect was higher on algal biomass of grassland streams. Then, 30% of functional traits showed grazing effect. High profile algae predominated in the grassland stream, where ungrazed substrates showed higher proportions of species with pad mucilage and colonial life form. Algal communities in the afforested stream remained at an early stage of succession, with a predominance of small and low profile algae in both substrates, and FD and evenness indices were lower. Our results indicate that the relative strength of top‐down versus bottom‐up control is different among stream types and the primary regulatory factor of freshwater communities can be modified according to such forestry practice.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 58%

Disentangling grazing and light controls on algal communities in grassland and afforested streams

Cibils‐Martina

Márquez

Gari

et al. 2019

Ecological Research

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“…Revegetation of grassland is increasing rapidly in many parts of the world, and has attracted current scientific interest for its contribution to mitigating emissions of carbon dioxide, controlling soil erosion, restoring degraded land, and potential impacts on ecosystem function and long-term sustainability (Jackson et al 2002;Makitalo et al 2010;Don et al 2011;Principe et al 2015;Buendia et al 2016). The transition from grassland to tree and (or) shrub plantation modifies the quantity and quality of above-and belowground biomasses, soil organic matter content, vegetation structure, microclimate conditions, and soil nutrient cycles (Céspedes-Payret et al 2012;Souza et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Distribution of soil nutrients under and outside tree/shrub canopies on a revegetated loessial slope

2017

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Studies of soil nutrients in revegetated land have often not provided the sampling positions on a scale of individual trees and shrubs, suggesting that nutrients were assumed to not vary substantially at fine scales. This assumption, however, conflicts with the "fertile island" theory for arid and semi-arid areas. We assessed the importance of sampling position on nutrient contents in 0-100 cm soil profiles by examining differences between soils under and outside the canopies of Armeniaca sibirica and Caragana korshinskii on a slope on the Loess Plateau, China. Soil organic carbon, total nitrogen (TN), total phosphorus, ammonium N, and extractable P did not differ significantly under and outside the canopies, except for nitrate N (NO 3 −-N). The differences between these two canopy positions were significantly larger for C. korshinskii than A. sibirica for TP, significantly larger on upper than middle and lower slope sections for TN and NO 3 −-N. The NO 3 −-N content varied with sampling position around individual trees and shrubs, and trail tests about sampling position can be conducted around individual leguminous plants, in flatter areas, and in topsoil.

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“…En el caso de las sierras de Córdoba en la región central de Argentina los pastizales de altura han sido sometidos a diferentes acciones antrópicas, entre las que se encuentra la forestación comercial con especies arbóreas de crecimiento rápido, principalmente pinos (Jobbágy et al, 2006;Plevich, Núñez, Cantero, Demaestri y Viale, 2002). Esta modificación en el uso de la tierra se extiende hasta las riberas de los arroyos, provocando alteraciones en la intensidad lumínica que incide sobre los mismos (Principe, Márquez, Cibils-Martina, Jobbágy y Albariño, 2015). Esta situación plantea potenciales efectos sobre la diversidad y abundancia de plantas acuáticas, y de manera concomitante sobre la fauna de macroinvertebrados fitófilos.…”

Section: Discussionunclassified

Diversidad de macroinvertebrados fitófilos en arroyos de cabecera en pastizales de altura en Córdoba, Argentina

Rodríguez

Príncipe

Márquez

et al. 2017

Revista Mexicana de Biodiversidad

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Las macrófitas cumplen un rol importante en los sistemas lóticos, incrementando la heterogeneidad del hábitat, proveyendo alimento y refugio para la fauna. El objetivo del estudio fue analizar la estructura y composición de la comunidad de macroinvertebrados asociados a macrófitas en arroyos de cabecera en pastizales de altura (subcuenca Ctalamochita, Córdoba, Argentina) en 2 períodos hidrológicos. Asimismo, se evaluó la estructura de los ensambles de macroinvertebrados presentes en diferentes especies de macrófitas (Hydrocotyle spp., Rorippa nasturtium-aquaticum y Ranunculus flagelliformis). Se muestrearon 3 arroyos durante los periodos hidrológicos de aguas altas (marzo de 2012) y aguas bajas (agosto de 2012). En cada período se colectaron muestras de macroinvertebrados asociados a la macrófita dominante en cada arroyo. Se identificaron 72 taxones de macroinvertebrados fitófilos. Los más frecuentes y abundantes fueron Naidinae, Hyallela curvispina, Americabaetis spp., Corynoneura spp. y Rheotanytarsus spp. La composición de los ensambles difirió entre períodos hidrológicos y se detectó una mayor abundancia de macroinvertebrados en R. nasturtium-acuaticum. Los resultados demuestran que los parches de macrófitas en los arroyos de cabecera en pastizales de altura albergan una fauna de macroinvertebrados abundante y diversa, y proporcionan a su vez importante información de base para el biomonitoreo de estos sistemas acuáticos.

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Pine afforestation changes more strongly community structure than ecosystem functioning in grassland mountain streams

Cited by 16 publications

References 64 publications

Disentangling grazing and light controls on algal communities in grassland and afforested streams

Disentangling grazing and light controls on algal communities in grassland and afforested streams

Distribution of soil nutrients under and outside tree/shrub canopies on a revegetated loessial slope

Diversidad de macroinvertebrados fitófilos en arroyos de cabecera en pastizales de altura en Córdoba, Argentina

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