scholarly journals Reproductive success, selected nest characteristics and the effectiveness of establishing protection zones of the lesser spotted eagle (Aquila pomarina) population in Slovakia

2015 ◽  
Vol 9 (1) ◽  
pp. 127-145
Author(s):  
Miroslav Dravecký ◽  
Boris Maderič ◽  
Ján Kicko ◽  
Štefan Danko ◽  
Dušan Karaska ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Tree Species ◽  
Abies Alba ◽  
Alnus Glutinosa ◽  
Breeding Population ◽  
Protection Zone ◽  
Protection Zones ◽  
Aquila Pomarina ◽  
Special Protection Areas ◽  
Breeding Seasons

Abstract In 2011–201 4 monitoring of the lesser spotted eagle (Aquila pomarina) breeding population was conducted in eight special protection areas in Slovakia. From a total of 272 successful breeding attempts by 1 49 breeding pairs during 4 breeding seasons 277 young birds were fledged. The average reproductive success ratio was thus 0.51 juv./pair present, 0.69 juv./breeding pair and 1 .37 juv./1 00 km2. In the surveyed period a total of 1 51 protection zones were established around the nests in 11 9 breeding territories, which provided protection for 1 7% of the breeding population of the lesser spotted eagle in Slovakia. By testing the effectiveness of protection zones it was determined that in nests with an established protection zone the probability of successful raising of young is higher in comparison with nests without such a zone. The probability that breeding will be successful in the nests of breeding pairs without a protection zone was 48.1% (95% confidence intervals (CIs): 37.4–59.0%), and in nests with a protection zone 64.8% (95% CIs: 59.8–69.6%). Among the five most frequent nest tree species used by A. pomarina in Slovakia for breeding are Picea abies 61 × (28.4%), Pinus sylvestris 45× (20.9%), Quercus sp. 36× (1 6.7%), Fagus sylvatica 25× (11 .6%) and Abies alba 1 8× (8.4%). Among the rarer nest tree species used are Larix decidua 1 2× (5.6%) and Alnus glutinosa 3× (1 .4%), while a further 11 species of nest trees did not achieve even 1%. The highest number of nest trees (n = 21 5), i.e. 34 nests (1 5.8%), was found in the altitude range of 401–450 m a.s.l. and 29 nests (1 3.5%) at 351–400 m a.s.l. Other altitude zones were all below the 1 0% mark. A total of 54% of nests found (11 6 nests) are located in the altitude zone of 301–600 m a.s.l., and 71 nests (33%) in the zone 600–900 m a.s.l. The lowest situated nest was at an altitude of 1 50 m and the highest at 950 m; the average was 595.01 m a.s.l. The highest number of nests (n = 209) were located on trees in a range 1 5.1–20.0 m above the ground (n = 92, 44%), while the lowest nest found was at a height of 5 m and the highest at 30 m above the ground.

scholarly journals Consequences of different sample drying temperatures for accuracy of biomass inventories in forest ecosystems

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andrzej M. Jagodziński ◽  
Marcin K. Dyderski ◽  
Kamil Gęsikiewicz ◽  
Paweł Horodecki
Keyword(s):  
Tree Species ◽  
Large Scale ◽  
Forest Ecology ◽  
Abies Alba ◽  
Alnus Glutinosa ◽  
Dry Mass ◽  
Biomass Estimation ◽  
Stem Wood ◽  
Two Temperatures ◽  
The Difference

Abstract Biomass estimation is one of the crucial tasks of forest ecology. Drying tree material is a crucial stage of preparing biomass estimation tools. However, at this step researchers use different drying temperatures, but we do not know how this influences accuracy of models. We aimed to assess differences in dry biomass between two drying temperatures (75 °C and 105 °C) in tree biomass components and to provide coefficients allowing for recalculation between the given temperatures. We used a set of 1440 samples from bark, branches, foliage and wood of eight European tree species: Abies alba Mill., Alnus glutinosa (L.) Gaertn., Betula pendula Roth., Fagus sylvatica L., Larix decidua Mill., Picea abies (L.) H. Karst., Pinus sylvestris L. and Quercus robur L. The differences between drying temperatures were 1.67%, 1.76%, 2.20% and 0.96% of sample dry masses of bark, branches, foliage and stem wood, respectively. Tree species influenced these differences. Our study provided coefficients allowing for recalculation of masses between the two temperatures, to unify results from different studies. However, the difference in dry mass between the two temperatures studied is lower than the range of uncertainty of biomass models, thus its influence on results of large-scale biomass assessments is low.

scholarly journals Managing a breeding population of the Hooded Plover Thinornis rubricollis in a high-use recreational environment

1999 ◽  
Vol 9 (3) ◽  
pp. 255-270 ◽  
Author(s):  
Bernice Dowling ◽  
Michael A. Weston
Keyword(s):  
Reproductive Success ◽  
Preliminary Data ◽  
National Park ◽  
Breeding Population ◽  
Age Dependent ◽  
Causes Of Mortality ◽  
Management Techniques ◽  
Breeding Seasons ◽  
Rare Endemic

SummaryMornington Peninsula National Park, Victoria, Australia, is heavily used by recreationists. It also holds a breeding population of the Hooded Plover Thinornis rubricollis, a rare endemic shorebird. We monitored the population of plovers over seven breeding seasons, 1991–1998. Mortality of nests (about 60%), and of chicks (over 70%) was high, but preliminary data suggests mortality was low in juveniles. The major cause of mortality of nests was trampling by people. The causes of mortality in chicks is unknown, but mortality was age dependent, and was highest in the youngest chicks. A combination of management techniques that have been phased into operation over the seven years of the study appear to be increasing the reproductive success of the population.

scholarly journals THE CONCEPT OF THE SANITARY PROTECTION ZONE: APPROACHES AND DEFINITIONS

2021 ◽  
Vol 31 (5) ◽  
pp. 861-873
Author(s):  
P.V. Muntyanu
Keyword(s):  
General Term ◽  
Zone Size ◽  
Industrial Facility ◽  
Protection Zone ◽  
Atmospheric Air ◽  
The Public ◽  
Protection Zones ◽  
Cardinal Directions ◽  
Physical Impact ◽  
Definition Of

The article gives an authorial definition of the sanitary protection zone. Sources of ionizing radiation were not taken into account when the definition was created as they have their own specifics and require individual investigation. The definition of the sanitary protection zone is given through the substance of its features, which are disclosed through analysis and comparison of regulatory acts, draft regulatory acts and literature. The features of the sanitary protection zone are the following: facility in respect of which the sanitary protection zone is established; the purpose of its establishment; zone size and boundaries; zone location and configuration; restriction of rights within the zone boundaries. It is proposed to define the facility in a general term “real estate”. It is defined that the purpose of establishing a sanitary protection zone is to ensure the absence of harmful impact on human health outside its boundaries. The size of a sanitary protection zone is calculated in eight cardinal directions taking into account the chemical, biological and physical impact on atmospheric air. The location of a sanitary protection zone is determined around an industrial facility and resembles a belt in configuration. The boundaries of a sanitary protection zone are determined by the geodetic method. The size and boundaries of a zone are shown in urban development zoning maps and in the public cadastral map. Restrictions within sanitary protection zones are expressed in prohibition on construction and obligations on compliance with the established regime.

scholarly journals Floating rafts as breeding habitats for the Common tern, Sterna hirundo. Colonization patterns, abundance and reproductive success in Venice Lagoon

2018 ◽  
Vol 88 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Francesca Coccon ◽  
Stefano Borella ◽  
Nicola Simeoni ◽  
Stefano Malavasi
Keyword(s):  
Reproductive Success ◽  
Breeding Population ◽  
Venice Lagoon ◽  
Reproductive Period ◽  
Common Tern ◽  
Sterna Hirundo ◽  
Breeding Sites ◽  
Common Terns ◽  
Colonization Patterns ◽  
Floating Rafts

The Venice lagoon hosts the 15% of the entire Italian breeding population of Common terns, Sterna hirundo, highlighting the great value of the area for this species. However, in the last 25 years, a substantial decline of Common terns has been detected in the Lagoon, which culminated in 2008. The main causes of this negative trend were the loss of salt marsh habitats, where terns typically breed in the Venice lagoon. This was due to the increase in the mean sea level and the greater frequency of high tides during the reproductive period with consequent flooding of their breeding sites; competition with yellowlegged gulls (Larus michahellis), predation and human disturbance. As a preliminary experimental approach to counter the depletion of the species and favour its recovery, we performed a habitat loss compensation project by setting up four floating rafts (3x2m), covered by two different types of substrate (sandy and vegetal substrate). This was to function as an artificial nesting site safe from flooding, positioned in a protected internal wetland area of the Venice lagoon, Valle Averto (Sourthern Lagoon). We studied the colonization patterns of the rafts and the reproductive success of Common tern breeding pairs during the 2014 and 2015 breeding seasons. We also investigated those environmental and structural variables that could favour the use of the rafts and the nesting success of the species. In both years, the rafts were successfully colonized and used by terns for nesting. Our results also indicated higher temperature, lower rainfall and greater distance from the shore as the main habitat factors favouring the occurrence and the reproductive success of the breeding pairs, while a windrow of dead plants was indicated as the preferred substrate for covering rafts in order to make them more attractive. The results provided some suggestions for successful restoration plans to be developed in similar lagoon areas.

Extra-pair copulations in common murres I: a mate attraction strategy?

Behaviour ◽  
2006 ◽  
Vol 143 (10) ◽  
pp. 1241-1262 ◽  
Author(s):  
Maureen L. Cameron-Macmillan ◽  
Carolyn J. Walsh ◽  
Sabina I. Wilhelm ◽  
Anne E. Storey
Keyword(s):  
Reproductive Success ◽  
Uria Aalge ◽  
Success Rates ◽  
High Quality ◽  
Mate Attraction ◽  
Extra Pair Paternity ◽  
Socially Monogamous ◽  
Common Murres ◽  
Breeding Seasons

AbstractWe investigated the behavioural context of pair (PCs) and extra-pair copulations (EPCs) in individually-marked socially-monogamous, long-lived seabirds, common murres (Uria aalge). Since forced EPCs have been documented for this species, we first examined which sex controls successful (cloacal contact achieved) copulation. The finding that all successful copulations required female cooperation and crouching suggested that benefits of successful EPCs accrue primarily to females. In a group of murres for which paternity analyses indicated no extra-pair paternity, behavioural observations over five breeding seasons showed that individual females engaged in EPCs primarily under two circumstances: (1) before they were reunited with their mates, and (2) when they were in the process of re-pairing. There was no such relationship between EPCs and re-pairing for males. Successful EPCs occurred with familiar neighboring males of apparent high quality, indicated by their high ledge attendance and prior reproductive success rates. Thus, EPCs may be used by females to attract potential high quality mates in situations where females are attempting to re-pair as a result of divorce or mate death.

Invertebrate prey availability limits reproductive success but not breeding population size in suburban House Sparrows Passer domesticus

Ibis ◽  
2015 ◽  
Vol 157 (3) ◽  
pp. 601-613 ◽  
Author(s):  
Will J. Peach ◽  
John W. Mallord ◽  
Nancy Ockendon ◽  
Chris J. Orsman ◽  
William G. Haines
Keyword(s):  
Reproductive Success ◽  
Population Size ◽  
Prey Availability ◽  
Passer Domesticus ◽  
Breeding Population ◽  
House Sparrows ◽  
Invertebrate Prey

Influence on the variation in initiation of breeding in Peromyscus maniculatus

1991 ◽  
Vol 69 (3) ◽  
pp. 698-705 ◽  
Author(s):  
Sean T. Sharpe ◽  
J. S. Millar
Keyword(s):  
Reproductive Success ◽  
Peromyscus Maniculatus ◽  
Nest Site ◽  
Subalpine Forest ◽  
Stream Beds ◽  
Timing Of Initiation ◽  
Overwinter Mortality ◽  
Breeding Seasons ◽  
The Relationship ◽  
Forest Habitats

Correlates of the initiation of breeding by female Peromyscus maniculatus borealis (Mearns) were examined to test the hypotheses that asynchronous breeding was related to age, weight, matriline, and nest-site habitat. Life-history data were collected by mark–recapture techniques and by monitoring natal nests over two breeding seasons in 1985 and 1986. Timing of initiation of breeding was related significantly to nest-site habitat and age, but not to matriline or weight. At approximately the same altitude, females nesting in dry rocky stream beds bred first, followed by those in open rock fields, then shrub areas, and last in subalpine forest. Youngest animals bred first in all habitats, although the relationship between age and initiation date was weak. Habitat effects appeared to be primarily related to microclimatic effects. The influence of habitat on the timing of initiation of breeding also had consequences for reproductive success, total reproductive output, and survival. Reproductive success of first litters was greatest for females nesting in rocky stream beds in the spring and least for females nesting in shrub and forest habitats. The apparent advantages of early breeding in rocky stream beds were offset by greater overwinter mortality.

scholarly journals Evolution, plasticity and evolving plasticity of phenology in the tree species Alnus glutinosa

2015 ◽  
Vol 29 (2) ◽  
pp. 253-264 ◽  
Author(s):  
H. De Kort ◽  
K. Vander Mijnsbrugge ◽  
K. Vandepitte ◽  
J. Mergeay ◽  
O. Ovaskainen ◽  
...  
Keyword(s):  
Tree Species ◽  
Alnus Glutinosa

scholarly journals Hydrological properties of bark of selected forest tree species. Part 2: Interspecific variability of bark water storage capacity

2017 ◽  
Vol 59 (2) ◽  
pp. 110-122
Author(s):  
Anna Ilek ◽  
Jarosław Kucza ◽  
Karolina Morkisz
Keyword(s):  
Pinus Sylvestris ◽  
Tree Species ◽  
Storage Capacity ◽  
Water Storage ◽  
Abies Alba ◽  
Forest Tree ◽  
Main Role ◽  
Water Storage Capacity ◽  
Forest Tree Species ◽  
Surface Development

AbstractThe subject of the present research is the water storage capacity of bark of seven forest tree species: Pinus sylvestris L., Larix decidua Mill., Abies alba Mill., Pinus sylvestris L., Quercus robur L., Betula pendula Ehrh. and Fagus sylvatica L. The aim of the research is to demonstrate differences in the formation of bark water storage capacity between species and to identify factors influencing the hydrological properties of bark. The maximum water storage capacity of bark was determined under laboratory conditions by performing a series of experiments simulating rainfall and by immersing bark samples in containers filled with water. After each single experiment, the bark samples were subjected to gravity filtration in a desiccator partially filled with water. The experiments lasted from 1084 to 1389 hours, depending on the bark sample. In all the studied species, bark sampled from the thinnest trees is characterized by the highest water storage capacity expressed in mm H2O · cm-3, while bark sampled from the thickest trees - by the lowest capacity. On the other hand, bark sampled from the thickest trees is characterized by the highest water storage capacity expressed in H2O · cm-2whereas bark from the thinnest trees - by the lowest capacity. In most species tested, as the tree thickness and thus the bark thickness and the coefficient of development of the interception surface of bark increase, the sorption properties of the bark decrease with bark depth, and the main role in water retention is played by the outer bark surface. The bark of European beech is an exception because of the smallest degree of surface development and because the dominant process is the absorption of water. When examining the hydrological properties of bark and calculating its parameters, one needs to take into account the actual surface of the bark of trees. Disregarding the actual bark surface may lead to significant errors in the interpretation of research results.

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