A pollen morphology study from the Kelabit Highlands of Sarawak, Malaysian Borneo

Jones, Samantha Elsie; Pearce, Katharine Georgina

doi:10.1080/01916122.2014.940472

Cited by 21 publications

(8 citation statements)

References 18 publications

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“…Most species have the spheroidal shape for their pollen. The obtained data in the present study are in agreement with Liang 17 , Mangaly and Nayar 19 , Syamsuardi 21 , Jones and Pearce 22 , who all reported that the shapes of the pollen grains in the genus Globba are spherical and prolate, but in this study we also found oblate-spheroidal and prolate-spheroidal shaped pollen for the Globba.…”

Section: Discussionsupporting

confidence: 93%

“…Most Thai Globba pollen is primitive because it is short-echinate pollen, except for G. panicoides which is advanced because the exine sculpturing is psilate. Our study confirms the pollen of the genus Globba are inaperturate, which corresponds to Liang 17 , Chen 18 , Mangaly and Nayar 19 , Syamsuardi 21 , Jones and Pearce 22 who reported that the aperture of Globba is inaperturate. The spine apex can be divided into two groups, namely, sharp or blunt, and according to Kaewsri and Paisooksantivatana 20 the spine apexes of the genus Amomum have sharp or blunt apexes.…”

Section: Midribsupporting

confidence: 90%

“…These results agree with Chen 18 , Liang 17 , Mangaly and Nayar 19 , and Syamsuardi 21 , who reported that the exine sculpturing of pollen grains of the genus Globba are short-echinate and echinate-psilate. However, Jones and Pearce 22 found that the exine sculpturing of the pollen grains of G. propinqua is granulate with gemmae. In this study, we found the psilate type of exine ornamentation in the genus Globba for the first time.…”

Section: Midribmentioning

confidence: 99%

“…Most of the species assessed show long, simple unicellular trichomes on the abaxial surface, except in G. candida and G. siamensis, which has long, simple unicellular trichomes on both surfaces. The vascular system is arranged in several arcs; description follows Tomlinson 22 where the main arc is described as arc I, abaxial arc as arc II, adaxial arc as arc III, and a fourth arc closer to the adaxial surface as arc IV. Four groups in the species are recognized: Arc I (Fig.…”

Section: Midribmentioning

confidence: 99%

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Pollen morphology and leaf anatomy of genus Globba in Thailand

Kajornjit¹,

Saensouk²,

Saensouk³

2018

ScienceAsia

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Pollen morphology was investigated in 22 taxa of the genus Globba (Zingiberaceae) from Thailand by means of light microscopy and scanning electron microscopy. The pollen grains of all taxa examined are monad, radially symmetric, apolar, and inaperturate. The sizes of the pollen grains are medium and large. The pollen grains have various shapes: oblate-spheroidal, spheroidal, and prolate-spheroidal. The exine ornamentation is short-echinate with psilate between the spine, short-echinate with rugulate between the spine, and psilate. The two types of spine apex are blunt and sharp. Palynological data has not been useful at the specific level. The leaf anatomy of 26 taxa was investigated by epidermal peeling and transverse sections of the leaves. The results indicate that the significant leaf anatomical characteristics for species identification are types of stomata, types of trichome, number of rows in intercostal regions, position of hypodermis, shape of midrib, types of vascular system, shape of midrib and leaf margins in transverse sections, and cell inclusion. Based on these anatomical characteristics, an identification key for Globba at the species level is given for the first time.

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Section: Discussionsupporting

confidence: 93%

Section: Midribsupporting

confidence: 90%

Section: Midribmentioning

confidence: 99%

Section: Midribmentioning

confidence: 99%

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Pollen morphology and leaf anatomy of genus Globba in Thailand

Kajornjit¹,

Saensouk²,

Saensouk³

2018

ScienceAsia

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“…Pollen and spores were extracted using the standard method (Faegri & Iversen, ), counted to 300 pollen grains and identified to the finest taxonomical classification possible using the available literature (e.g. Pollen and Spore Image Database of the University of Goettingen‐available at http://gdvh.uni-goettingen.de/; Anderson & Muller, ; Jones & Pearce, ). The identified pollen taxa are grouped according to their life‐form: (a) trees/shrubs and (b) herbs/subshrubs (i.e.…”

Section: Methodsmentioning

confidence: 99%

Resilience of a peatland in Central Sumatra, Indonesia to past anthropogenic disturbance: Improving conservation and restoration designs using palaeoecology

et al. 2018

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1. Tropical peatlands, which provide important functions such as biodiversity provisioning and carbon (C) storage, are currently threatened by land-use conversions.Thus, conservation and restoration efforts are needed to maintain their functions.Conservation concepts aiming to separate human from ecosystems are no longer conceivable. Therefore, understanding peatland resilience to human disturbance, that is the ability of peatland ecosystems to maintain their structure and function despite perturbations and to return to their predisturbance states, can assist with integrating human needs into conservation strategies and improving restoration effectiveness.2. Understanding ecosystem resilience is often impeded by a lack of long-term data, which can be obtained from palaeoecological studies. Located close to the archaeological remains of the Malayu Empire, the Sungai Buluh peatland in Sumatra, Indonesia provides an opportunity to study the resilience of a tropical peatland to past human disturbance. We subjected a 250-cm-long peat core to palynological, charcoal and C content analyses to delineate the anthropogenic impact on the peatland and the ecosystem's response.3. The results revealed that extensive human activities in Sungai Buluh such as logging, grazing/cut-and-carry, and wild-harvesting started soon after humans occupied the vicinity of the peatland c. 1,000 cal yr bp. Even without fire use and cultivation, these activities were able to alter vegetation composition and decrease the peatland's C sequestration capacity. 4. Following site abandonment after the demise of the Malayu Empire at c. 600 cal yr bp, the palaeoecological record suggests that the Sungai Buluh peatland recovered in terms of both floristic composition and C sink function, with the latter recovering faster (c. 60 years) than the former (c. 170 years). 5. Synthesis. The palaeoecological record from Sungai Buluh provides the first evidence of tropical peatland recovery following human disturbance, which can help improve present peatland conservation/restoration strategies. The design of peatland wise-use strategies can mimic the "resilience-friendly" human activities identified in this study. Consideration should also be given to selecting rapidly the 170-year recovery time of the Sungai Buluh peatland suggests that the 60year timeframe currently allocated in most tropical peatland restoration projects may be insufficient. K E Y W O R D S ecosystem function and services, human activities, local policy, natural recovery, palaeoecology and land-use history, peat carbon sink, restoration design, sustainable use | 2475 Journal of Ecology HAPSARI et Al.

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