Soil seed banks in four 22-year-old plantations in South China: Implications for restoration

Wang, Jun; Ren, Hai; Yang, Long; Li, Danyan; Guo, Qinfeng

doi:10.1016/j.foreco.2009.07.049

Cited by 42 publications

(29 citation statements)

References 34 publications

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“…Seed density (1 222/m 2 ) was within the wide range reported for pine plantations in temperate zones (Moles & Drake 1999, Onaindia & Amezaga 2000, Wang et al 2009). Unfortunately, these figures are unavailable for tropical pine plantations.…”

Section: Discussionsupporting

confidence: 66%

Soil seed bank and the effect of needle litter layer on seedling emergence in a tropical pine plantation

Bueno¹,

Baruch²

2010

RBT

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Abstract:The soil seed bank is the basis for community establishment and permanence and plays a primary role in natural restoration of degraded or altered ecosystems. As part of a restoration project, this study aimed to quantify the soil seed bank and to evaluate the effect of the needle litter layer on seedling emergence. Soil samples from a pine plantation were collected at random in the field and set to germinate in a greenhouse. Half of them were covered by a 6cm layer of dead pine needles simulating field conditions. in the field, 20x20cm plots were established, half were left intact and half were cleaned from the litter needles. All four treatments had 15 replicates and seedling emergence was recorded during six months. Soil seed bank density was 1 222/m 2 from 17 morphotypes. in the field, the number of morphotypes and seedlings was only 9% and 6% respectively, of those emerged in the greenhouse, possibly due to watering and lack of predation in the latter. in both cases, herbs and graminoids were the dominant emerging seedlings, making up to 70-90% of the total. The needle layer didn't prevent seeds from reaching the soil but strongly reduced (>50%) seedling emergence, although high variability within treatments resulted in no statistically significant differences. These results show that the needle layer hinders germination and/or emergence of seedlings from the seed bank. its removal may be a recommended technique to accelerate natural restoration in pine plantations. Rev. Biol. Trop. 59 (3): 1071-1079. Epub 2011 September 01.

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Section: Discussionsupporting

confidence: 66%

Soil seed bank and the effect of needle litter layer on seedling emergence in a tropical pine plantation

Bueno¹,

Baruch²

2010

RBT

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“…Carrière et al, 2002a;Cole et al, 2010), as well as the height of the nuclei (McDonnell and Stiles, 1983;Handel, 1993, 2000;Toh et al, 1999). The number of recruits underneath planted species and their diversity is strongly affected by the species composition of the overstory (Barbier et al, 2008;Cusack and Montagnini, 2004;Lemenih et al, 2004;Parrotta, 1995;Silver et al, 2004;Wang et al, 2009). For example, Cusack and Montagnini (2004) found a fourfold range in the abundance of understory recruits under various timber plantation trees at three sites in Costa Rica.…”

Section: Species Compositionmentioning

confidence: 99%

Applied nucleation as a forest restoration strategy

Corbin

Holl

2012

Forest Ecology and Management

290

217

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“…Following this trend, one major aim of sustainable forest management is to convert forest plantations into naturally regenerating, and diverse ecosystems [5][6][7][8]. Natural regeneration is considered the backbone for sustainable forestry, and failure to establish natural regeneration hampers the efforts toward sustainable forest management [9,10]. Therefore, understanding the factors that control tree regeneration is a major research priority for forest managers worldwide [11,12].…”

Section: Introductionmentioning

confidence: 99%

Excessive Accumulation of Chinese Fir Litter Inhibits Its Own Seedling Emergence and Early Growth—A Greenhouse Perspective

Liu

Daryanto

Wang

et al. 2017

Forests

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Litter accumulation can strongly influence plants' natural regeneration via both physical and chemical mechanisms, but the relative influence of each mechanism on seedling establishment remains to be elucidated. Chinese fir (Cunninghamia lanceolata) is one of the most important commercial plantations in southern China, but its natural regeneration is poor, possibly due to its thick leaf litter accumulation. We used natural and plastic litter to study the effects of Chinese fir litter on its own seedling emergence and early growth, as well as to assess whether the effect is physical or chemical in nature. Results showed that high litter amount (800 g·m −2 ) significantly reduced seedling emergence and the survival rate for both natural and plastic litter. Low litter amount (200 g·m −2 ) exerted a slightly positive effect on root mass, leaf mass, and total mass, while high litter amount significantly inhibited root mass, leaf mass, and total mass for both natural and plastic litter. Root-mass ratio was significantly lower, and leaf-mass ratio was significantly greater under high litter cover than under control for both natural and plastic litter. Although the root/shoot ratio decreased with increasing litter amount, such effect was only significant for high litter treatment for both natural and plastic litter. Seedling robustness (aboveground biomass divided by seedling height) decreased with increasing litter amount, with high litter treatment generating the least robust seedlings. Because plastic and natural litter did not differ in their effects on seedling emergence and growth, the litter layer's short-term influence is primarily physical. These data indicated that as litter cover increased, the initial slightly positive effects on seedling emergence and early growth could shift to inhibitory effects. Furthermore, to penetrate the thick litter layer, Chinese fir seedlings allocated more resources towards stems and aboveground growth at the expense of their roots. This study provided experimental evidence of litter amount as a key ecological factor affecting seedling development and subsequent natural regeneration of Chinese fir.

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Soil seed banks in four 22-year-old plantations in South China: Implications for restoration

Cited by 42 publications

References 34 publications

Soil seed bank and the effect of needle litter layer on seedling emergence in a tropical pine plantation

Soil seed bank and the effect of needle litter layer on seedling emergence in a tropical pine plantation

Applied nucleation as a forest restoration strategy

Excessive Accumulation of Chinese Fir Litter Inhibits Its Own Seedling Emergence and Early Growth—A Greenhouse Perspective

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