The soil seed bank of a kauri (Agathis australis) forest remnant near Auckland, New Zealand

An experiment was conducted to determine the influence of time of grubbing in the late spring–early summer, panicle developmental stage at grubbing, and the presence or absence of roots on grubbed plants, on the initial and post-senescent viability of fruits of Nassella trichotoma in North Canterbury, New Zealand. The percentage of fruits viable, following desiccation of panicles removed from plants grubbed in the field, increased from 1% for panicles just beginning to emerge from the leaf sheath, to 49% for panicles fully extended at the time of grubbing. Similarly, as grubbing date was delayed from late November (late spring) until late December (early summer), fruit viability increased from 0.3 to 47%. Overall, 36% of the fruits were viable on panicles at the time of grubbing, increasing slightly to 47 and 44%, respectively, after a period of desiccation with and without the panicles being attached to the grubbed plant's root system. It was concluded that if recruitment of fruits of N. trichotoma to the soil seed bank is to be prevented in North Canterbury, plants must be uprooted before panicle extension. Delaying grubbing to when panicles are fully extended, while possibly enabling a higher percentage of plants to be detected and therefore destroyed, carries with it a high risk of permitting the recruitment of viable fruits to the soil seed bank.

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MORPHOFUNCTIONAL ECOLOGY OF SEEDLINGS FOUND IN A TROPICAL RAINFOREST SEED BANK, IN THE NORTHEAST OF BRAZIL

FLORESTA ◽

10.5380/rf.v51i3.71553 ◽

2021 ◽

Vol 51 (3) ◽

pp. 614

Author(s):

Joselane Príscila Gomes Da Silva ◽

Luiz Carlos Marangon ◽

Ana Lícia Patriota Feliciano ◽

Rinaldo Luiz Caraciolo Ferreira

Keyword(s):

Seed Bank ◽

Soil Seed Bank ◽

Floristic Composition ◽

Average Density ◽

Shade Cloth ◽

Forest Remnant ◽

The Family ◽

Polyethylene Bags ◽

And Gender ◽

Ombrophilous Forest

The aim of this study was to evaluate the identification and floristic composition of seedlings of tree species, located in the soil seed bank of a remnant of the Dense Ombrophilous Forest of the Lowlands, in the Northeast of Brazil, from a morphofunctional ecology standpoint. A hundred and fifty two soil samples (0.2 m x 0.15 m x 0.05 m) were taken from a forest remnant, stored in polyethylene bags, identified and then taken to the Forest Nursery at the Federal Rural University of Pernambuco, where they were placed in polyethylene boxes under a 70% shade cloth and evaluated daily for a period of seven months. The seedlings emerged were photographed, separated into morphospecies, identified at the family and gender level and, when possible, at the species level. The density and absolute frequency, as well as the successional and morphological classification of the seedling cotyledons were estimated. In total, 1,577 seedlings of 31 morphospecies were cataloged. Melastomataceae was the family that presented the greatest richness, representing 48% of the species identified. The average density was 344.62 seeds.m-2, with higher densities for species of the family Melastomataceae, together with Maprounea guianensis and Cecropia palmata. There was a predominance of seedlings with epigeal and phanerocotylar germination, and with foliaceous cotyledons, corresponding to 93.56%. The seed bank was composed, predominantly, by pioneer species such as Cecropia palmata, Henriettea succosa, Miconia hypoleuca and Miconia tomentosa. Seedlings with epigeal germination, foliaceous and phanerocotylar cotyledons predominated for being easily established in more open areas.

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The relationship between seed rain and the soil seed bank in a temperate rainforest stand near Auckland, New Zealand

New Zealand Journal of Botany ◽

10.1080/0028825x.1996.10410686 ◽

1996 ◽

Vol 34 (2) ◽

pp. 215-226 ◽

Cited By ~ 17

Author(s):

G. Sem ◽

N. J. Enright

Keyword(s):

New Zealand ◽

Seed Bank ◽

Soil Seed Bank ◽

Seed Rain ◽

Temperate Rainforest ◽

The Relationship

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SEASONAL SEMIDECIDUAL FOREST FRAGMENT SOIL SEED BANK AND IT’S RELATIONSHIP WITH CONSERVATION

Revista Árvore ◽

10.1590/1806-90882017000300011 ◽

2018 ◽

Vol 41 (3) ◽

Author(s):

João Juares Soares ◽

Sabrina Ferreira Laurito

Keyword(s):

Seed Bank ◽

Soil Seed Bank ◽

Pioneer Species ◽

Forest Fragment ◽

Regeneration Potential ◽

Soil Seed Banks ◽

Forest Remnant ◽

Dry Seasons ◽

Viable Seeds ◽

Wet And Dry Seasons

ABSTRACT Soil seed banks are the first source of seeds for regeneration after a forest’s disturbance. The present study aims to verify the regeneration potential of the soil seed bank of a Seasonal Semidecidual Forest remnant. The study was carried out at Canchim Farm, CPPSE - Embrapa (São Paulo State, Brazil). Soil samples were collected from the fragment in both the wet and dry seasons. An average of 307.8 seedlings/m2 was found in the dry season and an average of 144 seedlings/m2 was found in the dry station. Twenty six species of trees with viable seeds were found in the soil, mostly pioneer species; among them, Cecropia glaziovi Snethlage was the most abundant pioneer species. The soil seed bank can be considered of great potential for regeneration due to the presence of pioneers, secondary and later species.

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