Seed bank spatial pattern in a temperate secondary forest

Olano, José Miguel; Caballero, I.; Laskurain, Nere Amaia; Loidi, Javier; Escudero, Adrián

doi:10.1658/1100-9233(2002)013[0775:sbspia]2.0.co;2

Cited by 32 publications

(30 citation statements)

References 31 publications

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“…Unfortunately, these figures are unavailable for tropical pine plantations. The high variability between replicates found here is frequent in this type of studies (Thompson 1986, Moles & Drake 1999, Olano et al 2002, and may suggest a non-random spatial distribution of seeds in the soil of the pine plantation. Despite the relatively favorable conditions under the pine canopy (lower air temperature and higher humidity) which would favor survival and growth of the seedlings, emergence was only <10% of that in the greenhouse.…”

Section: Discussionmentioning

confidence: 50%

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: Discussionmentioning

confidence: 50%

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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“…Furthermore, the limited presence of biotic seed dispersers in early stages is due to the decrease of food and refuge sites [55] and, coupled with grazing cattle and anthropogenic disturbances, may potentially halt the process of plant succession [56]. Since the soil seed bank may be considerably reduced in disturbed fragments [57], seed dispersal can play an important role in the recruitment of plants, and hence contribute towards the composition and density of woody plants and the eventual restoration of these forests [17,58,59]. On the other hand, besides humidity and temperature, other abiotic differences such as inclination and rocky hillsides between mature forest and intermediate and early forest may be influencing the differences in richness and structure of the successional stages.…”

Section: Discussionmentioning

confidence: 99%

Changes in Structure and Diversity of Woody Plants in a Secondary Mixed Pine-Oak Forest in the Sierra Madre del Sur of Mexico

Almazán-Núñez

Corcuera

Parra-Juárez

et al. 2016

Forests

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Abstract:The biotic province of the Sierra Madre del Sur presents a mosaic of woodlands at different successional stages due to frequent modifications in land use. In this study, we analyzed changes in woody flora across three successional stages of pine-oak forest: early, intermediate, and mature. Vegetation composition and diversity were characterized in 10 plots (each 0.28 ha). The mature stage had the highest values for species richness, abundance, and diversity. Pioneer plants were dominant in the early-successional site and may promote the establishment of late-successional species. The vegetation structure was more complex in the mature stage, where members of the Quercus genus were co-dominant with Pinus species. Pine tree richness was highest in the early-successional stage, and its abundance increased at the intermediate-successional site. These results suggest that Pinus species can grow in perturbed and sunny environments but also require favorable edaphic and microclimatic conditions, such as those found in intermediate woodlands. Results of this fieldwork support the initial floristic composition succession model, which suggests that species present at early stages will also occur in subsequent stages. Ecological succession may be considered to be a natural restoration process, and thus, conservation strategies should focus on maintaining distinct successional communities in addition to mature forests in order to preserve a high number of species.

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“…Birch is a good colonizer, with dense seed bank (Olano et al, 2002) and seed rain (unpublished data), therefore its population was able to establish in high numbers immediately after the last stand perturbation in 1967 (Herrera et al, 2001). Moreover, its inability to emerge on litter and almost null survivorship under low light regimes (Laskurain, 2008;LePage et al, 2000) limited the temporal extent of this establishment window.…”

Section: Discussionmentioning

confidence: 99%

Pourquoi et où les arbres adultes meurent dans une jeune forêt tempérée? Le rôle du voisinage

Olano¹,

Laskurain

Escudero

et al. 2009

Ann. For. Sci.

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Abstract• The density and identity of tree neighbourhood is a key factor to explain tree mortality in forests, especially during the stem exclusion phase.• To understand this process, we built a logistic model for mortality in a spatially explicit context, including tree and neighbourhood predictors. Additionally, we used this model to build mortality risk frequency distributions. Finally, we tested this model against a random mortality model to predict the spatial pattern of the forest.• Annual mortality rate was high for pedunculate oak (Quercus robur, 6.99%), moderate for birch (Betula celtiberica, 2.19%) and Pyrenean oak (Q. pyrenaica, 1.58%) and low for beech (Fagus sylvatica, 0.26%). Mortality risk models for pedunculate oak and birch included stem diameter, tree height, canopy position and neighbourhood. Mortality was affected by the specific nature of the neighbourhood showing a clear competitive hierarchy: beech > pedunculate oak > birch. Models based on random mortality and logistic regression model were able to predict the spatial pattern of survivors although logistic regression predictions were more accurate.• Our study highlights how simple models such as the random mortality one may obscure much more complex spatial interactions. Mots-clés :Ripley's K non homogènes / modèle logistique / forêt tempérée mixte / succession / mortalité des arbres Résumé -Pourquoi et où les arbres adultes meurent dans une jeune forêt tempérée ? Le rôle du voisinage.• La densité et l'identité des arbres du voisinage sont un facteur clé pour expliquer la mortalité d'arbres dans les peuplements forestiers, surtout pendant la phase d'exclusion du tronc.• Pour comprendre ce processus, nous avons construit un modèle logistique pour la mortalité dans un contexte spatialement explicite, en incluant l'arbre et des prédicteurs de voisinage. De plus, nous avons utilisé ce modèle pour construire des distributions de fréquence de risque de mortalité. Finalement, nous avons évalué ce modèle par rapport à un modèle de mortalité aléatoire pour prédire la structure spatiale de la forêt.• Le taux de mortalité annuelle était élevé pour le chêne pédonculé (Quercus robur, 6.99 %), modéré pour le bouleau (Betula celtiberica, 2.19 %) et le chêne tauzin (Q. pyrenaica, 1.58 %) et faible pour le hêtre (Fagus sylvatica, 0,26 %). Les modèles de risque de mortalité pour le chêne pédonculé et le bouleau intégraient le diamètre du tronc, la hauteur de l'arbre, la position du houppier et le voisinage. La mortalité a été affectée par la nature spécifique du voisinage montrant une hiérarchie claire dans l'aptitude compétitive : hêtre > chêne pédonculé > bouleau. Les modèles basés sur une mortalité aléatoire et le modèle logistique ont été capables de prédire la répartition spatiale des survivants bien que les prédictions du modèle logistique étaient plus précises.• Notre étude montre comment des modèles simples basés sur une mortalité aléatoire peuvent obscurcir des interactions spatiales beaucoup plus complexes.

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Seed bank spatial pattern in a temperate secondary forest

Cited by 32 publications

References 31 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

Changes in Structure and Diversity of Woody Plants in a Secondary Mixed Pine-Oak Forest in the Sierra Madre del Sur of Mexico

Pourquoi et où les arbres adultes meurent dans une jeune forêt tempérée? Le rôle du voisinage

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