A comparative study of the seed germination biology of a narrow endemic and two geographically-widespread species of Solidago (Asteraceae). 6. Seed bank

摘要: Seeds of the geographically-widespread Solidago altissima and S. nemoralis narrow-endemic shortii were buried in pots soil placed a glasshouse without temperature control. After 0.3–4.3 years burial, some seeds (21–60%) all three species viable they germinated to 75–100% during 2 weeks incubation light at 30/15°C. Soil samples collected from several population sites altissima, monitored for seedling emergence. During first, second, third, fourth, fifth sixth springs, number seedlings m −2 emerging was 108–1080, 8–494, 0–520, 0–69, 0–6 3, respectively, 108–1122, 17–667, 0–42, 0–6, 0, 0 61–1753, 0–25, respectively. More emerged disturbed than non-disturbed soil, but differences not significant. Thus, although remained throughout 4.3-year burial period, longevity greater size seed bank larger field-collected containing those narrow endemic. Although 34 studies have reported 17 present banks, study is first show, conclusively that can form persistent bank.