Changes in the Mediterranean pine forest: pollination patterns and annual trends of airborne pollen

Linares, Concepción De; Delgado, Rosario; Aira, María Jesús; Alcázar, Pilar; Alonso-Pérez, Silvia; Boi, Marzia; Cariñanos, Paloma; Cuevas, E.; Guardia, Consuelo Díaz de la; Elvira‐Rendueles, Belén; Fernández‐González, Delia; Galán, Carmen; Gutiérrez-Bustillo, A. Montserrat; Pérez-Badía, Rosa; Rodríguez-Rajo, F. J.; Valenzuela, Luis Ruiz; Molina, Rafael Tormo; Trigo, María Del; Valencia-Barrera, Rosa María; Valle, Ana M.; Belmonte, Jordina

doi:10.1007/s10453-017-9476-4

Cited by 19 publications

(15 citation statements)

References 43 publications

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“…During recent years, temperature trends have displayed regional differences with a non-uniform influence on ecological processes [10,58,59]. These trends have much more influence in winter and early spring flowering trees, since in these seasons the temperature registered during the last years has varied widely [4,60].…”

Section: Discussionmentioning

confidence: 99%

Pollen Production of Quercus in the North-Western Iberian Peninsula and Airborne Pollen Concentration Trends during the Last 27 Years

Fernández-González

González-Fernández

Ribeiro

et al. 2020

Forests

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Natural forests are considered a reservoir of great biological diversity constituting one of the most important ecosystems in Europe. Quercus study is essential to assess ecological conservation of forests, and also of economic importance for different industries. In addition, oak pollen can cause high sensitization rates of respiratory allergies in pollen-allergy sufferers. This study sought to know the pollen production of six oak species in the transitional area between the Eurosiberian and Mediterranean Bioclimatic Regions, and to assess the impact of climate change on airborne oak pollen concentrations. The study was conducted in Ourense (NW Spain) over the 1993–2019 period. A Lanzoni VPPS 2000 volumetric trap monitored airborne pollen. A pollen production study was carried out in ten trees randomly selected in several Quercus forest around the Ourense city. Oak pollen represented around 14% of annual total pollen registered in the atmosphere of Ourense, showing an increasing trend during the last decade. Pollen production of the six studied oak species follow the proportions 1:1:2:5:90:276 for Q. ilex, Q. faginea, Q. rubra, Q. suber, Q. pyrenaica, and Q. robur respectively. We detected a significant trend to the increase of the annual maximum temperature, whereas a decrease of the maximum and mean temperatures during three previous months to oak flowering. This could be related with the detected trend to a delay of the oak Main Pollen Season onset of 0.47 days per year. We also found significant trends to an increase of the annual pollen integral of 7.9% pollen grains per year, and the pollen peak concentration of 7.5% pollen grains per year. Quercus airborne pollen monitoring as well as the knowledge of the reproductive behavior of the main oak species, bring us an important support tool offering a promising bio-indicator to detect ecological variations induced by climate change.

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Section: Discussionmentioning

confidence: 99%

Pollen Production of Quercus in the North-Western Iberian Peninsula and Airborne Pollen Concentration Trends during the Last 27 Years

Fernández-González

González-Fernández

Ribeiro

et al. 2020

Forests

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“…This result could be explained as a washing out effect of the airborne pollen by precipitation. Several authors have published about the direct negative effect that precipitation has on the amount of pollen collected during the pollination season (Frei 1998;Jato et al 2002;Díaz de la Guardia et al 2003;Peternel et al 2004;Green et al 2004;Janati et al 2004;Khwarahm et al 2014;De Linares et al 2017;Vélez-Pereira 2017). Recio et al (2010) gives also an explanation to this negative correlation, expressing that the content of water in the soil facilitates the vegetative growth better than the flowering.…”

Section: Correlations Between Mpin and Monthly Values Of The Meteorolmentioning

confidence: 99%

Airborne pollen parameters and their relationship with meteorological variables in NE Iberian Peninsula

2018

Self Cite

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The present study explores the role of the meteorological variability in the pollen production and the timing of the airborne pollen season by analysis of the correlation between precipitation, insolation and temperature and the main standardised airborne pollen parameters of 22 taxa collected at 6 localities in Catalonia (NE Spain). The pollen parameters included in the study were: Annual Pollen Integral and the Start, End and Length of the Main Pollen Season. Considering that the Main Pollen Season of most of the taxa in Catalonia lasts from spring to summer or autumn, correlations between the pollen parameters and winter (from December to March) values of meteorological variables were calculated. Correlations between Monthly Pollen Integral and monthly values of the meteorological variables were also calculated. The results obtained report the synchronism registered in the variations of pollen concentration with precipitation (negative), insolation (positive) and temperature (positive). Temperature was the meteorological variable that showed a greater influence in the pollen production and the timing of the pollen season, being insolation the least one. The Start of the Main Pollen Season was the pollen parameter more correlated with the meteorological variables, especially with winter temperatures.

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“…Although the TAPD also changed every year, a general trend during the past five decades was not in evidence. These results did not support the hypothesis of a more extended pollen season through time with rising global air temperatures (De Linares et al, 2017). A year with an extended period was usually followed by a year with a short period.…”

Section: Discussionmentioning

confidence: 62%

“…However, the critical variables for inducing pollen shedding and flowering can vary among different species and their habitat environments (Kelly & Sork, 2002;Kon & Noda, 2007). Some studies of pollen season reported an earlier onset (Orlandi et al, 2010) and an extended period of shedding (De Linares et al, 2017), while others revealed the opposite (Bogawski et al, 2014). Thus, it is necessary to study the pollen phenology (i.e., temporal dynamics of pollen development and release) of important tree species in their local environment.…”

Section: Introductionmentioning

confidence: 99%

Temporal patterns of pollen shedding for longleaf pine (Pinus palustris) at the Escambia Experimental Forest in Alabama, USA

Chen¹,

Brockway²,

Guo³

2020

Dendrobiology

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Longleaf pine is an important tree species in the southeastern United States and studying the temporal patterns of pollen shedding is crucial to a better understanding of its phenology and seed production. In this study, field observation data on the timing of pollen shedding from 1958 to 2013 were analyzed with reference to local weather conditions. Our results indicated that the time of peak pollen shedding after January 1 (TPPS) ranged from 53 days (about February 22) to 95 days (around April 5). There was no significant trend of decreasing TPPS. The number of days with the maximum air temperature above 0 °C was close to the TPPS. The accumulated maximum daily air temperature for the TPPS approximated an average of 1,342 °C. The TPPS declined with an increase in the average air temperature during winters. The time of 80% accumulated pollen density (TAPD) varied from 5 to 32 days, with an average of 13 days. Taylor’s power-law was evident in the TAPD data, with the time group of 10–15 days having an interval time of 2 years. Winter weather was not correlated with the TAPD. These results provide new information concerning the pollen phenology for longleaf pine trees.

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Changes in the Mediterranean pine forest: pollination patterns and annual trends of airborne pollen

Cited by 19 publications

References 43 publications

Pollen Production of Quercus in the North-Western Iberian Peninsula and Airborne Pollen Concentration Trends during the Last 27 Years

Pollen Production of Quercus in the North-Western Iberian Peninsula and Airborne Pollen Concentration Trends during the Last 27 Years

Airborne pollen parameters and their relationship with meteorological variables in NE Iberian Peninsula

Temporal patterns of pollen shedding for longleaf pine (Pinus palustris) at the Escambia Experimental Forest in Alabama, USA

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