Descomposición de hojarasca en seis arroyos de Bosque Mesófilo de Montaña en la cuenca alta del río La Antigua, Veracruz, México

Abstract

Descomposición de hojarasca en seis arroyos de Bosque Mesófilo deMontaña en la cuenca alta del río La Antigua, Veracruz, México We assessed relations between leaf decomposition rates (k), stream physicochemistry, and macroinvertebrates colonizing leaf packs. Physicochemical parameters showed a clear seasonal difference at all study streams. Leaves were colonized by collector-gatherer insects, followed by shredders. Assessment of factors related to k indicated that only forest cover was negatively related to leaf decomposition rates. Thus stream physicochemistry and seasonality had no impact on decomposition rates. We concluded that leaf litter decomposition at our study streams is a stable process over the year. However, it is possible that this stability is the result of factors regulating decomposition during the different seasons and streams. Rev. Biol. Trop. 62 (Suppl. 2): 111-127. Epub 2014 April 01.

Controles extrínsecos e intrínsecos en la descomposición de hojas de tres especies de árboles pioneros comunes en quebradas de bajo orden en los Andes Centrales de Colombia

“…Las rápidas tasas de descomposición en el Neotrópico han sido atribuidas a las altas y estables temperaturas registradas en el agua a lo largo de todo el año (i.e. Costa Rica [67], Colombia [36], Costa Rica [68], México [69]). En este estudio, a pesar de ser una zona andina de elevación intermedia, se presentaron temperaturas del agua relativamente altas.…”

“…El grupo de los fragmentadores, representado por Tipula (Tipulidae), Philloicus (Calamoceratidae), Anchytarsus (Ptilodactylidae) y Atopsyche (Hydrobiosidae), sólo representó el 1% del total de la muestra mientras los colectores fueron dominantes (70% de abundancia relativa). Esto resultados coinciden con otros estudios realizados en el Neotrópico que han reportado un bajo número de fragmentadores en experimentos de descomposición de hojarasca y mayor representación de colectores [23,35,36,41,69].…”

Stream food webs in tropical mountains rely on allochthonous carbon regardless of land use

“…Ecosystem processes are also affected by the land use surrounding the stream. For example, leaf-litter decomposition rates increase as forest cover decreases, potentially the result of increases in nutrient levels and other disturbances [53]. Thus, while food webs remain based on allochthonous resources, multiple other ecosystem components change with land use change.…”

Diversity of Freshwater Macroinvertebrate Communities in Los Tuxtlas, Veracruz, Mexico

“…Other studies in this basin report fewer groups [28]. In the Antigua basin, Armas (2015) [30] recorded six classes, 15 orders, 59 families and 101 genera; Astudillo (2014) [31] recorded 31 families. In the Actopan River basin, Castro et al (2015) [26] recorded 12 families.…”

“…For Mexico, there are works from the central highlands [21][22][23][24]. Specifically, there are several published studies for the state of Veracruz on AqMI, highlighting those of the Pánuco River in the north of the state [25], the Totoapan and Paso Real rivers of the Actopan River basin [26], the Blanco River [27] and the Atoyac River [28,29] in the center of the state, and the La Antigua River [30,31], as the closest to the region of Los Tuxtlas. Most of the works are at the family taxonomic level due to the difficulty in assigning the genus or species; some records for America report between three to five phyla and 6 to 10 classes.…”