Growth-Ring Boundary Anatomy and Dendrochronological Potential in a Moist Tropical Forest in Northeastern Bangladesh

Islam, Mahmuda; Rahman, Mizanur; Bräuning, Achim

doi:10.3959/1536-1098-74.1.76

Cited by 35 publications

(31 citation statements)

References 55 publications

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“…In many tropical species it is not possible to identify clearly early‐ and latewood, with instead in each growth ring a large portion dominated by a tissue analogous to earlywood, and a small portion restricted to the edge of the ring with tissues analogous to latewood, and constituting the outer border or edge of the growth ring (e.g. Worbes & Fichtler, ; Sonsin et al ., ; Nath et al ., ; Tarelkin et al ., ; Silva et al ., ; Islam et al ., ) (Fig. ).…”

Section: Anatomical Featuresmentioning

confidence: 93%

“…The best‐studied type of growth ring, although certainly not the most common, is when the cambium enters dormancy only once a year, producing in consequence a single growth ring for this period. Dendrochronologists are especially interested in this type of periodicity because of its applications (Babst et al ., ; Schöngart et al ., ; Islam et al ., ). The view that annual growth rings do not exist in tropical species was pervasive until the 20th century, when studies supporting the presence of annual rings in these species began to gain influence (Worbes et al ., ).…”

Section: Periodicitymentioning

confidence: 97%

“…() and Islam et al . () is a possible way forward, in which samples are classified first regarding the presence of growth rings and secondly, in those where they are present, the intensity of expression is further classified thus:…”

Section: Anatomical Featuresmentioning

confidence: 99%

“…In this review we examine aspects that have emerged in the treatment of growth rings from the early studies (Coster, , ; Stallings, Schulman & Douglass, ; Chowdhury, , ; Reed & Glock, ; Glock & Reed, ; Glock, , ; Studhalter, ; Studhalter et al ., ; Fritts, ) to the most recent. Based on these aspects, we seek to outline a more robust and wide‐ranging concept of growth rings to serve as a starting point for a discussion on these structures, which are recognized as important for their applicability and inter‐relationships with other areas of knowledge (Babst et al ., ; Islam et al ., ). The main aspects emerging from this treatment of growth rings are listed in Fig.…”

Section: Introductionmentioning

confidence: 97%

“…The study of growth rings in the tropics is much more complex than in temperate regions due to the greater number of species, diversity of habitats, behaviour of cambial activity and phenology, anatomical markers for growth rings and their respective degrees of distinction and mainly the absence of well‐defined seasons (Borchert, ; Borchert & Rivera, ; Schöngart et al ., ; Worbes & Fichtler, ; Slik et al ., ; Tarelkin et al ., ; Silva et al ., ; Islam, Rahman & Bräuning, ). It is not only the high species diversity of tropical regions which contributes to the greater structural variability of growth rings (Worbes & Fichtler, ) but also the greater complexity of the secondary xylem of the angiosperm species which dominate these environments, as compared to that of the gymnosperms (Wheeler, Baas & Gasson, ; Carlquist, ; Evert, ).…”

Section: Introductionmentioning

confidence: 99%

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The growth ring concept: seeking a broader and unambiguous approach covering tropical species

2019

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The concept of growth rings is little discussed in the literature and their treatment remains somewhat confusing in terms of the diversity of structures described. This situation has a major impact on the study of growth rings in tropical species, in which variations and complexity are greater and accuracy of identification less good. The rigid conceptual delimitations used by dendrochronologists and wood anatomists of temperate regions cannot be applied to the study of growth rings in most tropical species, which has led to neglect of this subject. With the objective of discussing the concept of growth rings, the present study consists of a survey of anatomical, periodicity, causal and evolutionary aspects of the treatment of these structures as evidenced in previous studies, and the evaluation of their application and limitations to the development of this concept. Anatomical aspects arise through radial integrity, or the presence of early and late wood; the degree of distinction of the rings, which may vary from well to poorly defined; and tangential continuity, meaning that rings may form a complete circle in the transverse section of the trunk, or instead be tangentially discontinuous, lens-shaped or in wedges. In addition there are a diversity of anatomical markers which enable us to recognize growth rings. Regarding periodicity, the rings may be annual, infra-annual or supra-annual. Causal aspects include genetic, endogenous and environmental components. Evolutionary aspects continue to be insufficiently investigated, and although most comparative studies treat growth rings recognized by different markers as though they were a single character, it remains questionable whether they can be regarded as homologous or the result of homoplasy. We conclude that the elaboration of a robust but broad definition which can include all the variation observed in growth rings of tropical species is a complex task, which is only possible by overcoming the restrictions adopted by dendrochronologists and wood anatomists of temperate regions for whom growth rings are essentially annual, strongly demarcated, tangentially continuous and restricted to the most pronounced markers.

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Section: Anatomical Featuresmentioning

confidence: 93%