The role of pre- and post-dispersal seed predation in determining total seed loss

Klinken, Rieks D. van; White, Andrew J. P.

doi:10.1016/j.baae.2014.08.012

Cited by 12 publications

(11 citation statements)

References 18 publications

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“…Após esse período, a predação aumentou até atingir 60%, na última análise, além disso pôde ser notado que a taxa no aumento da predação foi semelhante ao padrão da taxa de queda na viabilidade de sementes ao longo do tempo. Segundo Van Klinken & White (2014), oscilações de baixa e alta predação de sementes no solo no início do banco de sementes é bastante comum em florestas tropicais.…”

Section: Figuraunclassified

Comportamento de Sementes de Peltophorum dubium [(Spreng.) Taub.] em Banco de Sementes Induzido

2017

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RESUMOA capacidade que determinadas espécies têm de manter as sementes viáveis por longos períodos no banco de sementes é essencial para a resiliência ambiental, o que é utilizado na restauração florestal. Este trabalho teve como objetivo estudar o comportamento de banco de sementes induzido de P. dubium. A indução do banco de sementes foi feita em fragmento de Floresta Estacional Semidecídual. Foram utilizadas 100 amostras de copos de polietileno, compostas por 25 sementes cada. A cada dois meses, 5 amostras foram retiradas para determinação de: conteúdo de água, viabilidade, porcentagem de emergência de plântulas e porcentagem de predação. As sementes da espécie P. dubium podem permanecer por até 16 meses viáveis enterradas no solo. Esse resultado permite a classificação da espécie como formadora de banco de sementes persistente. A predação de sementes foi o principal fator para que ocorresse a redução do banco de sementes do solo.Palavras-chave: dormência, viabilidade, longevidade. Behavior of Peltophorum dubium ((Spreng.) Taub.) Seeds in a Burial Seed Bank ABSTRACTThe ability of certain species in keeping the seeds viable for long periods in the soil seed bank is essential for environmental resilience, which is used in forest restoration. This work aimed to study the behavior of a buried seed bank of P. dubium. Burial seed bank was performed in a fragment of Seasonal Semideciduous Forest. One hundred samples consisting of 25 seeds in polyethylene cups were placed under the canopy. Every two months, five samples were taken for determination of water content, viability, emergency (root protrusion and seedling formation) and predation. Seeds of P. dubium may remain buried in the ground for up to 16 months keeping their viability. This result indicates that P. dubium is able to form persistent soil seed bank. The predation was the main factor contributing to the seed bank reduction.

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Section: Figuraunclassified

Comportamento de Sementes de Peltophorum dubium [(Spreng.) Taub.] em Banco de Sementes Induzido

2017

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“…seeds on the plant, as well as on or in the soil have to be taken into account. Thereby total predation is often highest at the most persistent seed stage, especially in a highly variable environment among years (van Klinken and White, 2014), which are, in our case and due to the dispersal properties of C. podocarpa, free seeds on the ground. For this seed stage, we could observe removal rates of up to 90% after 5 days of exposition.…”

Section: Discussionmentioning

confidence: 95%

“…On the other hand, we cannot exclude, that predator activity may be affected by C. podocarpa density on a larger scale. However, not only predator identity and microsite conditions, but also seed density can influence predation rates (but see van Klinken and White, 2014). In arid ecosystems seed production often is a demographic bottleneck for successful plant recruitment (Joubert et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

How does the seed fate of Crotalaria podocarpa DC, a highly competitive herbaceous legume in arid rangelands, contribute to its establishment probability?

Fischer

Kollmann

Wagner

2015

Perspectives in Plant Ecology, Evolution and Systematics

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“…, Satake et al. , Van Klinken and White ). Predation rates and dynamics differ among seed predator species (Kolb et al.…”

Section: Introductionmentioning

confidence: 99%

Seed production and predation in a changing climate: new roles for resource and seed predator feedback?

Solbreck

Knape

2017

Ecology

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Climate change may cause changes in the dynamics of populations beyond comparatively simple directional effects. To better understand complex effects on dynamics requires long-term studies of populations that experience changes in climatic conditions. We study the dynamics of a seed-production-seed-predation system, consisting of a perennial herb and its two seed predatory insects, over a 40-yr period during which climate change has caused the annual growing season to increase by 20 d. During this period, plant patches have increased almost threefold in size and seed production has slipped into a pattern of alternate high and low years with a higher variance than in the beginning of the period. We find that seed production is associated with precipitation of the present summer and a non-linear feedback from seed production of the previous year. When previous year's seed production is low, weather forcing and unexplained noise determine the extent of seed production. When previous seed production is high, depleted resources limit seed production. Resource depletion happened frequently in the latter parts of the study but rarely in the beginning. The changing patterns of seed production in turn affect the dynamics of seed predation, which is dominated by one of the seed predators. Its dynamics are strongly linked to seed density fluctuations, but its population growth rate is satiated when resource fluctuations become too large. In the latter part of the study period, when seed fluctuations were alternating between years of high and low density, satiation was common and there was a large increase in surviving seeds in good years. Our study illustrates that a changing climate can fundamentally influence patterns of long-term dynamics at multiple trophic levels.

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The role of pre- and post-dispersal seed predation in determining total seed loss

Cited by 12 publications

References 18 publications

Comportamento de Sementes de Peltophorum dubium [(Spreng.) Taub.] em Banco de Sementes Induzido

Comportamento de Sementes de Peltophorum dubium [(Spreng.) Taub.] em Banco de Sementes Induzido

How does the seed fate of Crotalaria podocarpa DC, a highly competitive herbaceous legume in arid rangelands, contribute to its establishment probability?

Seed production and predation in a changing climate: new roles for resource and seed predator feedback?

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