Reproductive biology of Abies cephalonica Loudon in Mount Aenos National Park, Cephalonia, Greece

Trees ◽  
2011 ◽  
Vol 25 (4) ◽  
pp. 655-668 ◽  
Author(s):  
Patrizia-I Politi ◽  
Kyriacos Georghiou ◽  
Margarita Arianoutsou
Keyword(s):  
Reproductive Biology ◽  
National Park ◽  
Abies Cephalonica

Interannual variability of germination and cone/seed morphometric characteristics in the endemic Grecian fir (Abies cephalonica) over an 8-year-long study

2017 ◽  
Vol 28 (1) ◽  
pp. 24-33 ◽  
Author(s):  
Evangelia N. Daskalakou ◽  
Katerina Koutsovoulou ◽  
Lida Mavroeidi ◽  
Charalambos Tsiamitas ◽  
Eleftheria Kafali ◽  
...  
Keyword(s):  
Seed Germination ◽  
National Park ◽  
Extreme Values ◽  
Considerable Proportion ◽  
Silver Fir ◽  
Morphometric Characteristics ◽  
Abies Cephalonica ◽  
Wide Range ◽  
Diachronic Study ◽  
Germination Behaviour

AbstractAbies cephalonicacone and seed morphometric characteristics as well as seed germination behaviour were investigated during an 8-year-long diachronic study (2007–2015). The research was carried out in Parnitha National Park, in the part of this Greek endemic, silver fir population that was spared from an unprecedented wildfire (2007). A statistically significant interannual and among-tree variation of cone traits has been identified, except for cone diameter. Cone length is correlated to the number of seeds per cone, while the percentage of empty seeds has been consistently high, with extreme values of 29.3 and 81.8% in a masting (2015) and lean crop (2009) year, respectively. There is also a considerable proportion of dead (including infected) and non-germinated seeds, and the eventual germinable fraction is well below 25% with spikes in masting years (39.4 and 60.9% in 2010 and 2015, respectively). Untreated seeds have been tested at a wide range of constant and alternating temperatures and germination is completed within 4–5 weeks atT≥ 15°C andca15 weeks at 5–10°C. A chilling pretreatment of 4–8 weeks (at 2–4°C) concludes germination at 15–20°C within 2 weeks. A significant white light requirement has been observed for untreated seeds at 15–20°C, while germination was light indifferent at lower or higher temperatures. Data obtained in this study confirm the present, field seed germination during springtime; we may also predict an earlier germination (late autumn to mid-winter) in forest gaps, under the predicted, warmer conditions in the future.

scholarly journals Post-fire recovery of Abies cephalonica forest communities: the case of Mt Parnitha National Park, Attica, Greece

2018 ◽  
Vol 11 (6) ◽  
pp. 757-764 ◽  
Author(s):  
A Christopoulou ◽  
D Kazanis ◽  
NM Fyllas ◽  
M Arianoutsou
Keyword(s):  
National Park ◽  
Forest Communities ◽  
Abies Cephalonica

scholarly journals Nest, eggs and nestling description of the Silvery-flanked Antwren Myrmotherula luctuosa (Pelzeln, 1868) in the Atlantic Forest of northeast Brazil

2019 ◽  
Vol 27 (4) ◽  
pp. 238-241
Author(s):  
Cleverton da Silva ◽  
Cristiano Schetini de Azevedo ◽  
Juan Ruiz-Esparza ◽  
Adauto de Souza Ribeiro
Keyword(s):  
Reproductive Biology ◽  
Atlantic Forest ◽  
National Park ◽  
The State ◽  
Internal Diameter ◽  
Northeast Brazil ◽  
Forest Fragments ◽  
Male And Female ◽  
Present Information ◽  
Outside Diameter

AbstractIn the present study, we describe the nest, eggs, and nestlings of the Silvery-flanked Antwren, Myrmotherula luctuosa. One nest was found on 08 May 2017 on the edge of one of the forest fragments of the Serra de Itabaiana National Park, in the state of Sergipe, northeast Brazil, and was monitored until 21 May 2017. The nest, presented the following dimensions: external height: 7.6 cm; outside diameter: 21 × 19 cm; internal diameter: 13.3 × 11 cm; depth of the oologic chamber: 4.7 cm; and height in relation to the ground: 84 cm. The two eggs found in the nest were white with reddish-brown dots, patches and stripes and weighed 1.7 and 1.5 g. Incubation was performed by both the male and female, as well as feeding of the nestlings. A single egg hatched, giving rise to a 3.9 cm, 3.7 g nestling. According to our estimates, the young fledged with about 11 days. This is the first study to present information about the reproductive biology of the Silvery-flanked Antwren.

An assessment of the reproductive biology of Yellowstone bison (Bison bison) subpopulations using noncapture methods

1996 ◽  
Vol 74 (1) ◽  
pp. 8-14 ◽  
Author(s):  
J. F. Kirkpatrick ◽  
J. C. McCarthy ◽  
D. F. Gudermuth ◽  
S. E. Shideler ◽  
B. L. Lasley
Keyword(s):  
Reproductive Biology ◽  
National Park ◽  
Demographic Data ◽  
Fetal Loss ◽  
Bison Bison ◽  
Age Group ◽  
Fecal Steroid ◽  
Lactating Cows ◽  
Steroid Analysis ◽  
Free Ranging

Five parameters of reproductive biology (number of live calves, rates of tending lactating and nonlactating cows, and age-specific calving and pregnancy rates) were measured for the Mary Mountain (≈2500) and Northern Range (≈600) herds of bison (Bison bison) in Yellowstone National Park between 1990 and 1993. Three physiological events (ovulation, pregnancy, fetal loss) affecting reproductive success were measured using urinary or fecal steroid analysis. Adult Mary Mountain cows had significantly fewer pregnancies and calves than the Northern Range cows. Approximately 85% of cows tended by bulls, 76% of detected ovulations, and 78% of detected fall pregnancies were among nonlactating cows. Greater than 80% of all pregnancies occurred in cows ≥4 years old in both herds. However, 100% of all pregnancies among lactating cows occurred in cows ≥5 years old in both herds. In the Mary Mountain subpopulation, only 5% of all pregnancies were among cows <4 years old, while 14.2% of all pregnancies in the Northern Range herd occurred in cows in the same age group. These data indicate that (i) the number of live calves and the pregnancy rate are significantly reduced among lactating cows, (ii) reproductive failure among lactating cows is primarily caused by ovulation failure, (iii) lactating cows that successfully reproduce are exclusively animals ≥5 years old, and (iv) the results of urinary or fecal steroid analysis are consistent with behavioral and demographic data and can be used to evaluate specific aspects of reproductive physiology among free-ranging ungulates.

Reproductive Biology of the Tawny-Crowned Tunchiornis (Tunchiornis ochraceiceps) In Manu National Park, Perú

2017 ◽  
Vol 129 (4) ◽  
pp. 813-819
Author(s):  
Mario A. Loaiza-Muñoz ◽  
Wendy A. Valencia-Montoya ◽  
Gustavo A. Londoño
Keyword(s):  
Reproductive Biology ◽  
National Park ◽  
Manu National Park
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