کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5742527 1617694 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variation in the effects of burial in different peatland successional stages on seed survival of four wetland species
ترجمه فارسی عنوان
تغییر در تأثیر دفن در مراحل مختلف جانوری در بوته های مختلف بر بقای چهار گونه تالاب
کلمات کلیدی
آزمایشگاه کشتار نیاز جوانهزنی، اندازه دانه، بانک دانه زمین لرزه،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی


- Variation in seed survival following burial among successional stages was assessed.
- The between-depth difference in light quantity decreased as succession progressed.
- The effects of burial on light-sensitive seeds decreased as succession progressed.
- The survival of light-insensitive seeds was equal across all stages following burial.

The availability of viable seeds in soil helps to determine the success of ecological restoration in disturbed habitats. Although seed survival in soil generally increases with an increase in burial depth, whether the effects of burial on seed survival are comparable across different sites is unclear. In this study, I tested the hypothesis that the positive effects of burial on seed survival decrease as vegetation develops through succession. Four wetland species, Drosera rotundifolia, Lobelia sessilifolia, Rhynchospora alba and Moliniopsis japonica, were used for the study. The four species differ in their light requirement for germination; i.e., D. rotundifolia, L. sessilifolia and R. alba germinate best in light, whereas M. japonica germinates equally well in light and darkness. The seeds of these species were buried for two years at three depths (litter, 0 and 4 cm) in three successional stages with different amounts of vegetation and litter in a post-mined peatland. The photosynthetically active radiation (PAR) and temperature at each of litter layer, 0 cm and 4 cm depths were measured for each successional stage. The between-depth differences in PAR and temperature fluctuations decreased as succession progressed. For the three light-demanding species, burial promoted seed survival more in the initial successional stage than in the later successional stages, whereas for M. japonica, burial promoted seed survival equally in all successional stages. This study revealed significant variation in the effects of burial on seed survival, particularly for light-sensitive seeds, and that the soil surface layers in vegetated sites can contain persistent seeds, which could be used as a seed source in restoration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Oecologica - Volume 78, January 2017, Pages 26-33
نویسندگان
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