Epiphytic Bryophytes of Old-Growth Platanus Orientalis Gallery Forest in Kadıncık Valley (Mersin/Turkey) Were Studied
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Pak. J. Bot., 49(2): 623-630, 2017. EPIPHYTIC BRYOPHYTE COMMUNITIES AND SUCCESSION ON PLATANUS ORIENTALIS TREES IN KADINCIK VALLEY (MERSIN/TURKEY) TÜLAY EZER Biology Department, Faculty of Science, Ömer Halisdemir University, 51100 Nigde-Turkey *Corresponding author’s email: [email protected]; [email protected] Abstract In this study, epiphytic bryophytes of old-growth Platanus orientalis gallery forest in Kadıncık Valley (Mersin/Turkey) were studied. In total thirthy-three epiphytic bryophyte species were found (29 mosses, 4 liverworts) in 60 sample plots, each 20 x 20 cm in size. In order to evaluate the relative abundance of bryophyte communities in the epiphytic habitats on trunks, index of ecological significance (IES) was used. Multivariate statistical analyses (TWINSPAN and DECORANA) were also used to classify and to determine the epiphytic bryophyte community structures in successional stages. The multivariate statistical analyses results indicated that the sample plots were divided into two main clusters and five subclusters associated with gradient of successional satages. Vertical (tree height) and horizontal (tree diameter) distribution patterns of epiphytic bryophytes and their life forms were also observed along a gradient of height and the gradient of age of the Platanus orientalis. Orthotrichum diaphanum, Eurhynchium striatum, E. angustirete and Brachythecium albicans were only found on young trees, Brachythecium rutabulum and Cinclidotus riparius were only found on middle-aged trees, and Cirriphyllum crassinervium and Cratoneuron filicinum were only growing on old trees. Key words: Bryophytes, Epiphytic, Succession, TWINSPAN, DECORANA, Platanus orientalis, Turkey. Introduction knowledge of vertical distribution patterns and community structures of epiphytic bryophytes in Gallery forests that occur as corridors along the successional stages is still fragmentary. Here, margins of streams and rivers are one of the important successional trends among epiphytic bryophytes of refuge areas as vegetation formation. Especially, they Platanus orientalis gallery forest in Kadıncık Valley have a wide range of ecosystem functions because of were investigated using the index of ecological their microclimate and water holding capacity, and significance (IES). The present study was aimed to provide suitable habitats for local flora and fauna increase our knowledge about the successional gradients (Özbucak et al., 2008). of epiphytic bryophyte communities in Platanus Bryophytes are pioneer plants of different substrate orientalis gallery forest in Turkey using of multivariate types, and produce a major part of the biomass in several ordination techniques (TWINSPAN and DECORANA). landscapes (Campos et al., 2015). In addition, epiphytic bryophytes are a conspicuous and characteristic The study area: The Kadıncık Valley is located in the component of forest ecology. The community between border of the Tarsus and Çamlıyayla district of composition of epiphytic bryophytes is mainly regulated Mersin province in the eastern Mediterranean region of by environmental conditions. Environmental drought Turkey. It is characterized by V-shaped river valleys and particularly is one of the factors that affect the situated in the C13 square in grid system of Turkey distribution of species (Mazimpaka & Lara, 1995). In adopted by Henderson (1961) (Fig. 1). The climate in the several studies, correlations between bryophyte region is semi-arid Mediterranean climate type communities in the epiphytic habitats and their phorophyte characteristics have been studied in characterized by dry and warm summers. There is no Mediterranean Basin (Burgaz et al., 1994; Lara & weather station in the study site. The nearest Mazimpaka, 1998; Draper et al., 2003; 2005; Marques et meteorological station is located in Çamlıyayla (Mersin). al., 2005; Mazimpaka et al., 2009; 2010; Ezer et al., According to the data of the station, the mean annual 2009; Medina et al., 2010; Ezer & Kara, 2013; Medina rainfall is 555 mm, and the mean annual temperature is et al., 2015; Calleja et al., 2016). The previous studies 11.8°C (Fig. 1). Lithologically, the area has got limestone had concluded that phorophyte species, tree exposure, bedrock, and has deep colluvial soil (Ok & Avşar, 2007). tree age, height, forest stand type and tree canopy as The main types of vegetation in the study site is well as climatic conditions were the most important maquis. The red pines (Pinus brutia Ten.) are rarely variables influencing epiphytic bryophyte colonisation occuring within the maquis. Ceratonia siliqua L., Laurus along trunk surfaces and succession in Mediterranean nobilis L., Olea europaea L. var. sylvestris (Mill.) Lehr., areas. There are quite limited studies on epiphytic Rhamnus alaternus L., Phillyrea latifolia L., Cercis bryophytes in the Turkey (Kürschner et al., 2006; 2012; siliquastrum L. ssp. siliquastrum, Arbutus andrachne L., Düzenli et al., 2009; Kara et al., 2011; Alataş & Batan, Anagyris foetida L., Pistacia terebinthus L. ssp. 2014; 2015; Alataş et al., 2015). Only two of these (Ezer palaestina (Boiss.) Engler and Daphne sericea Vahl. and et al., 2009; Ezer & Kara, 2013) studied the succession Platanus orientalis L. are main woody taxa in the study of epiphytic bryophyte communities. Therefore, the site (Ok & Avşar, 2007). 624 TULAY EZER Fig. 1. Localization of the study site and ombrothermic diagram of Çamlıyayla. Materials and Methods from each tree zones were analysed. The percentage cover of species was visually estimated. Species percentage Field sampling procedure: The epiphytic bryophytes were cover and ecological data were also registered in each collected from the bark of Platanus orientalis in the sampling plots. Kadıncık Valley during land studies in 2015. Only the P. Nomenclature of the epiphytic bryophyte species found orientalis was chosen as a porophyte species in order to in the quadrats follows Ros et al. (2013) for mosses, and Ros avoid ecological variations caused by different bark et al. (2007) for liverworts (Table 2). Habitat affinity of structures (Moe & Botnen, 2000). Four sites in the bryophytes was established following Mazimpaka & Lara deciduous old-growth gallery forest were selected. Details (1995) and Draper et al. (2003). Life form types of plants of the sampled localities are given in Table 1. According to were determined as described by Magdefrau (1982). Voucher the homogenous tree density, a total of 20 plane-trees of specimens were identified and stored in the herbarium of different ages were sampled within the gallery forest. Ömer Halisdemir University. Plane-trees were divided into three age classes using the an indirect method as young (dbh 140–180 cm, 21 sampling Data analysis: The relative frequency of each species plots), middle-aged (dbh 195–210 cm, 21 sampling plots), was determined by the Index of Ecological Significance and old trees (dbh 230–400 cm, 18 sampling plots). designed by Lara & Mazimpaka (1998), Albertos et al. Table 1. Details of sampled localities. (2001) and Mazimpaka et al. (2009) expressed as: Site GPS coordinate Altitude (m) L1 N 37°14'53.61" EO 34°37'43.56” 926 IES = F (1 + C) L2 N 37°14'11.25" EO 34°37'58.76" 890 L3 N 37°13'30.24" EO 34°38'17.63" 840 where F is relative frequency (100 x / n), and C is cover L4 N 37°12'45.92" EO 34°38'17.50" 780 of the species (Σ ci / x). x represents the number of sampling plots with the species, n is total number of Each plane tree was divided into the basal zone (0–40 sampling plots, and ci is cover class assigned to the cm from the ground), the middle zone (40–120 cm), and species in each sampling plot. Cover classes of bryophyte the top zone (120–180 cm) as proposed by Moe & Botnen species were established using the six-point Lara & (2000). Sample plots from tree zones were defined by 20 Mazimpaka (1998) scale. The IES values have been × 20 cm quadrats. Samples were not taken from the combined in the following abundance classes: very scarce phorophyte branches in the present study. A total of 60 (< 25), scarce (26–50), moderately abundant (51–100), sampling plots, consisting of 20 sampling plots taken abundant (101–200), and dominant (> 200). EPIPHYTIC BRYOPHYTES OF OLD-GROWTH PLATANUS ORIENTALIS 625 Table 2. List of bryophytes recorded in epiphytic habitats. Species Families Life-form type Habitat affinity Mosses Homalothecium sericeum (Hedw.) Schimp. Brachytheciaceae mat Indifferent Anomodon viticulosus (Hedw.) Hook. & Taylor Anomodontaceae tail Cortico-saxicolous Leucodon sciuroides (Hedw.) Schwaegr. Leucodontaceae tail Customary epiphyte Palamocladium euchloron (Müll.Hal.) Wijk & Margad. Brachytheciaceae tail Cortico-saxicolous Alleniella complanata (Hedw.) S.Olsson, Enroth & D.Quandt Neckeraceae fan Cortico-saxicolous Zygodon rupestris Schimp. ex Lorentz Orthotrichaceae cushion Customary epiphyte Leptodon smithii (Hedw.) F. Weber & D. Mohr Leptodontaceae fan Cortico-saxicolous Hypnum cupressiforme Hedw. Hypnaceae mat Indifferent Orthotrichum speciosum Nees Orthotrichaceae cushion Customary epiphyte Homalothecium philipheanum (Spruce) Schimp. Brachytheciaceae mat Indifferent Cryphaea heteromalla (Hedw.) D.Mohr Cryphaeaceae tail Customary epiphyte Homalothecium lutescens (Hedw.) H.Rob. Brachytheciaceae mat Indifferent Plagiomnium undulatum (Hedw.) T.J.Kop. Mniaceae tall-turf Indifferent Brachythecium glareosum (Bruch ex Spruce) Schimp. Brachytheciaceae weft Indifferent Brachythecium rivulare Schimp Brachytheciaceae weft Indifferent Amblystegium serpens (Hedw.) Schimp