The Epiphytic Bryophyte Flora of the Colombian Amazon

Campos, Laura V.; Steege, Hans ter; Uribe, Jaime

doi:10.15446/caldasia.v37n1.50980

Cited by 16 publications

(14 citation statements)

References 12 publications

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“…The communities used for a placement of the sensors reflect the distribution of bryophytes among height zones in the Amazonian rain forest (Cornelissen and ter Steege, 1989;Oliveira, 2010;Oliveira and ter Steege, 2015;Pantoja et al, 2015). Studies describe that Lejeuneaceae (common liverwort family of the Amazon region comprising the genus Symbiezidium) are more diverse and abundant in the canopy area, while mosses are mainly concentrated at the tree base and trunk in a plateau ecosystem (Campos et al, 2019;Oliveira, 2010Oliveira, , 2018. The species identified by us (Table S1) have also been reported as being frequent at other tropical rain forest sites (Campos et al, 2015;Dislich et al, 2018;Gradstein and Salazar Allen, 1992;Mota de Oliveira et al, 2009;Pinheiro da Costa, 1999).…”

Section: Microclimatic Conditions Within Epiphytic Habitatmentioning

confidence: 99%

“…The ranges of the compensation points (CPs) and the optimum temperature (opt) were reported in Lösch (1994) and Wagner et al (2013;see Table S4). conditions, such as, e.g., exposition, tree foliage, and inclination of the substrate (Barkman, 1958;Campos et al, 2019;Cornelissen and ter Steege, 1989;Oliveira and Oliveira, 2016;Sierra et al, 2018). These small-scale patterns also explain the variability observed within one height level.…”

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 Conditions Within Epiphytic Habitatmentioning

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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“…Whereas at the stem bases close to the ground Sematophyllum subsimplex and Leucobryum martianum were dominating, Octoblepharum cocuiense and the liverwort Symbiezidium barbiflorum were the main species occurring at higher levels along tree stems at the ATTO site, obviously in close adaption to the specific locations. These species have also been reported as being frequent at other tropical rain forest sites (Campos et al, 2015;Dislich et al, 2018;Gradstein and Allen, 1992;Mota de Oliveira et al, 2009;Pinheiro da Costa, 1999). 5…”

Section: Potential Physiological Activity Of Bryophytesmentioning

confidence: 73%

Microclimatic and ecophysiological conditions experienced by epiphytic bryophytes in an Amazonian rain forest

Löbs

Walter

Barbosa

et al. 2019

Preprint

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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 are largely unknown. As cryptogams are poikilohydric organisms, they are physiologically active only under moist conditions. Thus, information on their water content, as well as temperature and light conditions experienced by them are essential to analyzing their impact on local, regional, and even global biogeochemical processes. In this study, we present data on the microclimatic and ecophysiological conditions of epiphytic bryo-phytes along a vertical gradient and combine these with mesoclimate data collected at the Amazon Tall Tower Observatory (ATTO) in the Amazonian rain forest between October 2014 and December 2016. While the monthly average mesoclimatic ambient light intensities above the canopy revealed only minor variations, the light intensities incident on the bryophytes showed different patterns at different heights, probably depending on individual shading by vegetation. At 1.5&thinsp;m height, monthly average light intensities were similar throughout the year and individual values were extremely low, exceeding 5&thinsp;µmol&thinsp;m&minus;2&thinsp;s&minus;1 pho-tosynthetic photon flux density only during 8&thinsp;% of the time. Temperatures showed only minor variations throughout the year with higher values and larger height-dependent differences during the dry season. Water contents of bryophytes varied depending on precipitation and air humidity. Whereas bryophytes at higher levels were affected by frequent wetting and drying events, those close to the forest floor remained wet over longer time spans during the wet seasons. Based on estimates of the potential duration of net pho-tosynthesis and dark respiration, our data suggest that water contents are decisive for overall physiological activity, and light intensities determine whether net photosynthesis or dark respiration occurs, whereas temperature variations are only of minor relevance in this environment. In general, bryophytes growing close to the forest floor are limited by light availability, while those growing in the canopy must withstand larger variations in microclimatic conditions, especially in the dry season. Measurements of CO2 gas ex-change are essential to elucidate their physiological activity patterns in greater detail.

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“…In recent years, studies on epiphytic bryophytes in the world have been increasing. (Cornelissen and Steege, 1989;Montfoort and Ek, 1989;Burgaz et al, 1994;Lara and Mazimpaka, 1998;Moe and Botnen, 2000, Draper et al, 2003González-Mancebo et al, 2003Garcia et al, 2005;Leon-Vargas et al, 2006;Pereira Alvarenga and Porto, 2007;Mazimpaka et al, 2009;Medina et al, 2010;Sim-Sim, 2011;Odor, 2013;Oliveira and Steege, 2013;Campos and Steege, 2015). There are some studies on the subject in Turkey (Ezer et al, 2009(Ezer et al, , 2010(Ezer et al, , 2017Ezer and Kara, 2013;Batan 2015, Kırmacı andAgcagil, 2018;Alataş et al, 2018Alataş et al, , 2019a.…”

Section: Introductionmentioning

confidence: 99%

Epiphytic Bryophyte Flora of Liquidambar orientalis Forests

Çatak

Kırmacı

2020

Anatolian Bryology

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Liquidambar orientalis forests which are very important for Turkey and the world continue to exist in its unique habitat. In the present study, epiphytic bryophyte flora of L. orientalis, naturally spreads in Turkey, was investigated between the years of 2016-2019. A total of 27 localities were visited and 433 envelope plant samples were taken. As a result of identifications, in total 49 bryophytes (48 moss, 1 liverwort) were determined. These taxa were taken from the base, trunk and branches of the trees and presented as a table format. And also, Orthotrichum philibertii and Zygodon catarinoi has been given as the second distributional locality for Turkey. We believe that this study will contribute to the bryophyte flora of Turkey and the preservation of Liquidambar orientalis forests.

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The Epiphytic Bryophyte Flora of the Colombian Amazon

Cited by 16 publications

References 12 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

Microclimatic and ecophysiological conditions experienced by epiphytic bryophytes in an Amazonian rain forest

Epiphytic Bryophyte Flora of Liquidambar orientalis Forests

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