Vertical distribution and diversity of epiphytic bryophytes in the Colombian Amazon

Campos, Laura V.; Oliveira, Sylvia Mota de; Benavides, Juan C.; Uribe-M., Jaime; Steege, Hans ter

doi:10.1080/03736687.2019.1641898

Cited by 14 publications

(20 citation statements)

References 49 publications

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“…In the current study we measured the microclimatic conditions experienced by epiphytic bryophyte communities along a vertical gradient over the course of more than 2 years. In previous studies, microclimatic data on the light, temperature, and air humidity have been assessed at different height levels within the forest (Chazdon and Fetcher, 1984;Lösch et al, 1994;Romero et al, 2006), but long-term measurements of the water content and the light and temperature on top and inside the cryptogamic communities have been missing up to now.…”

Section: Microclimatic Conditionsmentioning

confidence: 99%

“…High light intensities above 1000 µmol s −2 s −1 occurred in the understory only as small light spots of short duration and thus were only observed 0.008 % of the time. For the understory of a rain forest in Costa Rica, light intensities were reported to range from 10 to 1000 µmol m −2 s −1 , and more than in 50 % of the total amount of light resulted from sun flecks (Chazdon and Fetcher, 1984). Bryophyte and lichen taxa in the understory are known to be adapted to these low-light conditions and are able to make efficient use of the rather short periods of high light intensities (Lakatos et al, 2006;Lange et al, 2000;Wagner et al, 2014).…”

Section: Microclimatic Conditionsmentioning

confidence: 99%

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Microclimatic conditions and water content fluctuations experienced by epiphytic bryophytes in an Amazonian rain forest

et al. 2020

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Abstract. In the Amazonian rain forest, major parts of trees and shrubs are covered by epiphytic cryptogams of great taxonomic variety, but their relevance in biosphere–atmosphere exchange, climate processes, and nutrient cycling is largely unknown. As cryptogams are poikilohydric organisms, they are physiologically active only under moist conditions. Thus, information on their water content (WC) as well as temperature and light conditions experienced by them are essential to analyze their impact on local, regional, and even global biogeochemical processes. In this study, we present data on the microclimatic conditions, including water content, temperature, and light conditions experienced by epiphytic bryophytes along a vertical gradient, and combine these with above-canopy climate data collected at the Amazon Tall Tower Observatory (ATTO) in the Amazonian rain forest between October 2014 and December 2016. While the monthly average of above-canopy light intensities revealed only minor fluctuations over the course of the year, the light intensities experienced by the bryophytes varied depending on the location within the canopy, probably caused by individual shading by vegetation. In the understory (1.5 m), monthly average light intensities were similar throughout the year, and individual values were extremely low, remaining below 3 µmol m−2 s−1 photosynthetic photon flux density more than 84 % of the time. Temperatures showed only minor variations throughout the year, with higher values and larger height-dependent differences during the dry season. The indirectly assessed water content of bryophytes varied depending on precipitation, air humidity, dew condensation, and bryophyte type. Whereas bryophytes in the canopy were affected by diel fluctuations of the relative humidity and condensation, those close to the forest floor mainly responded to rainfall patterns. In general, bryophytes growing close to the forest floor were limited by light availability, while those growing in the canopy had to withstand larger variations in microclimatic conditions, especially during the dry season. For further research in this field, these data may be combined with CO2 gas exchange measurements to investigate the role of bryophytes in various biosphere–atmosphere exchange processes, and could be a tool to understand the functioning of the epiphytic community in greater detail.

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Section: Microclimatic Conditionsmentioning

confidence: 99%

Section: Microclimatic Conditionsmentioning

confidence: 99%

Microclimatic conditions and water content fluctuations experienced by epiphytic bryophytes in an Amazonian rain forest

et al. 2020

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“…This is linked to differences in the ecophysiological responses to light availability of these two groups of epiphytes: canopy reduces the amount of photosynthetically active light and affects its spectral quality, and this is known to play an important role in the habitat ecology of many epiphytic lichens and bryophytes (e.g. Barkman 1958, Rikkinen 1995, 1997, Lange et al 2004, Rosabal et al 2010, Mota de Oliveira & ter Steege 2015, Campos et al 2019). Many bryophytes are best adapted to photosynthesize at relatively low light levels.…”

Section: Discussionmentioning

confidence: 99%

Epiphyte Colonisation of Fog Nets in Montane Forests of the Taita Hills, Kenya

Stam

Kaasalainen

et al. 2020

Annales Botanici Fennici

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The dispersal ecology of tropical non-vascular epiphytes has rarely been experimentally investigated. We studied epiphyte colonisation on 1 × 1 m polyethene nets placed for four years at seven sites at different elevations in montane forests in the Taita Hills, Kenya. During the first year the nets were also used to measure fog deposition. We predicted that differences in growth conditions would affect colonisation and subsequent growth of non-vascular epiphytes and result in clear differences in epiphyte cover and biomass, and community composition among sites. After four years the nets were taken down for determination of epiphyte cover and biomass. The diversity of established liverworts and macrolichens was also examined. Many liverwort and macrolichen species established diverse communities on the nets placed in the moist upper-montane zone. This was in contrast with the situation in the drier lower-montane zone where only green algae and crustose lichens were able to colonise most nets. Light intensity was an important determinant of epiphyte community composition, with liverworts dominating on nets under closed forest canopies and lichens dominating at more open sites. Atmospheric moisture was also important, with lichens benefiting from abundant fog deposition at open and windy sites. The dry weight of epiphytes (per unit area) on lichen-dominated nets was greater than on liverwort-dominated nets, while the highest cover was generally observed on liverwort-dominated nets. Our results demonstrate that polyethylene nets can be effectively used to study colonisation of non-vascular epiphytes as well as the abiotic and biotic factors controlling epiphyte colonisation and community composition in tropical forests. The liverworts Acanthocoleus chrysophyllus and Diplasiolejeunea kraussiana were new additions to the Kenyan bryophyte flora.

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“…Para la región amazónica existen diversos estudios que han permitido un avance en el conocimiento de briófitos de la región. Entre ellos se pueden mencionar los de Ruiz-A y Aguirre Ceballos (2004) en Tarapacá-Amazonas, donde evaluaron la diversidad y riqueza de la distribución vertical en árboles; Benavides et al (2004;2006), en regiones del Caquetá, Chiribiquete y Araracuara, realizaron estudios entorno a la diversidad de briófitos del sotobosque en bosques inundables y de tierra firme; Campos et al (2014;2019) efectuaron estudios en cuatro departamentos de la amazonia colombiana muestreando árboles vivos y hallaron diferencias en cuanto a la estructura y composición de las comunidades de briófitos en relación al gradiente vertical. El dato más reciente registra para el departamento del Amazonas 220 especies, 113 hepáticas y 107 musgos (Bernal et al, 2016).…”

Section: Introductionunclassified

Briófitos De Troncos en Descomposición De La Estación Biológica El Zafire, Amazonas-Colombia

Cataño

Uribe-M.

Campos³

2021

Acta biol. Colomb.

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En el presente trabajo se caracterizó la flora briofítica en troncos en descomposición en la estación meteorológica el Zafire, Amazonas-Colombia. Para ello se realizó un muestreode 100 unidades muestrales en 20 troncos en diferente estado de descomposición y en dos tipos de bosque (tierra firme y varillal inundable). Se reportan 120 especies, 81 hepáticas y 39 musgos, pertenecientes a 55 géneros (33 hepáticas y 22 musgos) y 21 familias (nueve hepáticas y 12 musgos). Se registran cuatro especies nuevas para el país, 25 para la amazonia colombiana y 41 para el departamento del Amazonas. En términos de riqueza total, el bosque de varillal presentó un valor mayor al de tierra firme. Sin embargo, estadiferencia no es significativa (Kruskal Wallis X2=0,199; p = 0,05);así mismo la diversidad fue mayor en el bosque de varillal inundable (Shanon = 3,93) en comparación con la del bosque de tierra firme (Shanon = 3,67). La composición de las comunidades de briófitos fue diferente entre los dos tipos de bosques (similitud igual a 40 %). En el estudio florístico de los dos tipos de bosques de la estación biológica, se evidenció una marcada dominancia de la familia Lejeunaceae, que representaron el 55,5 % de las hepáticas y el 37,5 % del total de las especies de briofitos.

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Vertical distribution and diversity of epiphytic bryophytes in the Colombian Amazon

Cited by 14 publications

References 49 publications

Microclimatic conditions and water content fluctuations experienced by epiphytic bryophytes in an Amazonian rain forest

Microclimatic conditions and water content fluctuations experienced by epiphytic bryophytes in an Amazonian rain forest

Epiphyte Colonisation of Fog Nets in Montane Forests of the Taita Hills, Kenya

Briófitos De Troncos en Descomposición De La Estación Biológica El Zafire, Amazonas-Colombia

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