Browsing by Autor "Lynn G. Clark"

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Chusquea sect. Tenellae (Bambuseae, Bambusoideae, Poaceae), a taxonomic revision of a new section from South America
(Q15088586, 2017) Lakshmi Attigala; A C.; Lynn G. Clark
The Chusquea ramosissima informal group, including four named species, is classified within Chusquea subg. Chusquea based on morphological characters, but has not been rigorously studied in its entirety. The putative synapomorphies distinguishing the C. ramosissima informal group from the remainder of Chusquea subg. Chusquea are the presence of a pseudopetiolate culm leaf blade that remains green and synflorescences borne on a mix of longer leafy and shorter non-leafy subsidiary branches per node, features unknown in the rest of the subgenus or the genus as a whole. In addition, the species of the C. ramosissima informal group share a bud complement with a set of 1–4 laterally compressed, + falcate subsidiary buds on each side positioned facing each other, a central bud with parallel sides and a broadly triangular apex, and thin-textured spikelets. Because of this unique combination of characters, including two that are unique within Chusquea, and molecular support, we here formally describe Chusquea sect. Tenellae within Chusquea subg. Chusquea to accommodate this group. Five species, distributed in Argentina, Brazil, Bolivia, Paraguay and Uruguay, are included in the newly recognized Chusquea sect. Tenellae: C. fasciculata, C. ramosissima, C. tenella, C. tenuiglumis, and the newly described C. ovatifolia. This revision includes a comparison of sect. Tenellae with the five previously recognized sections of subg. Chusquea, detailed descriptions for the five species of sect. Tenellae, line illustrations or images for all species, maps of their distributions, and morphological keys for their identification. The names Chusquea fasciculata, C. tenuiglumis, C. tenuiglumis var. laxiuscula and C. tenuiglumis var. subcylindrica are lectotypified.
Chusquea yungasensis (Bambusoideae, Poaceae): a new species of woody bamboo from South America and the first record of subgenus Rettbergia in Bolivia
(Q15088586, 2014) Aline Costa da Mota; Iván Jiménez Pérez; Reyjane P. Oliveira; Lynn G. Clark
A new species of Chusquea subg. Rettbergia is described, illustrated and compared with C. bambusoides. Chusquea yungasensis sp. nov. differs from other species of subg. Rettbergia by its racemose synflorescences. The new species is endemic to Bolivia, and found only in the Yungas ecoregion. Although this subgenus is exclusive to South America, this new species represents the first record of the group in Bolivia.
Guidelines for including bamboos in tropical ecosystem monitoring
(Wiley, 2020) Belén Fadrique; Joseph W. Veldman; James W. Dalling; Lynn G. Clark; Lía Montti; Eduardo Ruíz-Sánchez; Débora Cristina Rother; Francisca Ely; William Farfán-Ríos; Paul R. Gagnon
Abstract Bamboos are a diverse and ecologically important group of plants that have the potential to modulate the structure, composition, and function of forests. With the aim of increasing the visibility and representation of bamboo in forest surveys, and to standardize techniques across ecosystems, we present a protocol for bamboo monitoring in permanent research plots. A bamboo protocol is necessary because measurements and sampling schemes that are well‐suited to trees are inadequate for monitoring most bamboo species and populations. Our protocol suggests counting all bamboo culms (stems) in the study plot and determining bamboo dimensions based on two different approaches: (a) measuring a random subset of 60 culms and calculating the average dimensions or (b) measuring all culms. With data from 1‐ha plots in the Peruvian Andes, we show that both approaches provide very similar estimates of bamboo basal area. We suggest including all mature culms rooted inside change the to each plot from all woody bamboo species with maximum diameters ≥1 cm. We also present recommendations on how to collect vouchers of bamboo species for identification. Data collected according to our proposed protocols will increase our understanding of regional and global patterns in bamboo diversity and the role of bamboo in forest dynamics. Abstract in Spanish is available with online material.