Desarrollo de metodología acorde al cultivo

Es importante contar con una metodología que responda a las características y comportamiento del cultivo. Que permita establecer lotes, transeptos, árboles -ver BB 3- y tratamientos para la evaluación del efecto del servicio de polinización de manera objetiva. En el caso del marañón, se establecieron dos montajes por árbol: 1) Control absoluto: exclusión total de polinizadores con mallas que encierran las ramas seleccionadas, 2) Polinización: ramas marcadas y totalmente descubiertas. Al finalizar el periodo de floración y posterior fructificación, se comparan las diferencias entre los dos montajes para a) porcentaje (%) de cuajado de frutos, b) tamaño y peso de la manzana, c) tamaño y peso de la nuez, d) tamaño y peso de la almendra.

Es indispensable tener personal en campo que diariamente pueda trabajar en el cultivo. Ellas/os son quienes mejor capacitados deben estar en cuanto al estudio, sus objetivos y metodologías. Se recomienda hacer un acercamiento con los vecinos de los predios para asegurarse que posibles aplicaciones químicas no vayan a interrumpir con el estudio y generar alta mortandad de abejas. -ver BB1-

La metodología debe ser adaptada a las necesidades de cada cultivo. Por eso es importante conocer muy bien los tiempos y formas de cosecha establecidos. En marañón por ejemplo tuvimos que enmallar una rama adicional -después de estar expuesta a los polinizadores- para que los frutos formados no cayeran al suelo confundiéndose con los demás. Como en este cultivo lo que se aprovecha es la nuez y no el pseudofruto, se deja que estos caigan al suelo y después se recogen manualmente. Que los frutos se mezclaran en el suelo habría ocasionado una sobrestimación de producción.

Estandarización de variables para muestreos

Al momento de realizar ensayos en campo, se busca que los cultivos a evaluar tengan la mayor similitud para que los resultados sean más precisos. Por eso la distancia a centro urbano, la distancia a bosque nativo, la cercanía a fuentes hídricas, la variedad clonal y la edad de los árboles son variables que se deben considerar al momento de seleccionar las fincas. Así como la selección de colmenas con reina de buena postura y con alto interés de pecoreo (conducta de abejas obreras para salir a recolectar polen y néctar de las flores). 

El interés y participación de los productores de marañón es fundamental para seleccionar los predios idóneos para el estudio. También es importante tener claridad de las edades y variedades clonales, así como estudios de suelo. Contar con un histórico de producción anual en el predio es un dato relevante.

No consideramos la calidad de los distintos suelos, razón por la cual no era correcto atribuir el aumento de producción entre lotes/predios exclusivamente a la visita de abejas gestionadas. Condiciones edafoclimáticas pueden también influir en la productividad de marañón.

También sería importante realizar en lo posible el estudio en un área aislada. De esta forma se controla mejor que las colmenas gestionadas efectivamente están visitando en mayor proporción el cultivo objetivo.

Desarrollo de capacidades en la comunidad local

Es importante que las personas involucradas entiendan los principios de la polinización; ¿qué es la polinización gestionada?, ¿qué implica?, ¿cuáles son los posibles riesgos y los resultados esperados? Para esto se realizaron una serie de capacitaciones.

El nivel de apropiación e interés en el proyecto es un factor determinante para su desarrollo y continuidad. Toda la información es valiosa y las partes involucradas deberían tener claridad desde lo que es un calendario floral y las características de floración del cultivo, hasta la estructura y funcionalidad de la abeja. Asumir que las personas ya cuentan con cierto conocimiento puede generar accidentes o resultados poco satisfactorios en la polinización gestionada.

Se requiere la disposición de la comunidad local a aprender y participar. También una persona o grupo de personas expertas no solo en apicultura y polinización sino también con la destreza de enseñar y llegar a múltiples públicos. El espacio en que se realizan las capacitaciones debe tener buena acústica, sombra y ventilación.

Es bueno concertar los días y horarios de las sesiones de capacitación con la comunidad para que no interfieran con sus labores diarias. El material audiovisual debe ser muy claro y concreto con alto uso de ilustraciones. La mejor forma de aprender es haciendo, por eso sesiones prácticas en campo y laboratorio son las que la comunidad más aprovecha y recuerda.

Holding activities to build capability and improve awareness

The ABS project has been widely promoted throughout Guangxi, with about 50 promotional activities, 20 training sessions and related meetings, and more than 10,000 participants online and offline, to help with Guangxi ABS legislation and benefit-sharing.

These activities not only enhance the capacity building of relevant personnel, but also raise public awareness of biodiversity conservation and benefit-sharing.

Public awareness of - and public support for - program activities ensures success.

Promote benefit-sharing between enterprises and local communities/residents

Guangxi negotiated and implemented agreements on access to genetic resources and related traditional knowledge and benefit-sharing of Siraitia grosvenorii and Camellia nitidissima in Guilin and Fangchenggang, promoting the signing of more than 10 benefit-sharing agreements between enterprises and farmers in demonstration areas through measures such as value-insured recovery, benefit sharing, technology training, and enhanced resource protection. From 2019 to 2021, the campaign benefited more than 5,000 farmers in the major producing areas of Siraitia grosvenorii and Camellia nitidissima, helping nearly 300 poor households escape poverty.

 

From 2020 to 2021, the demonstration enterprise Guilin Monk Fruit Siraitia Grosvenorii Biotechnology Inc. has increased the returns from purchasing and recovering Siraitia grosvenorii by 50% year-on-year.

It is necessary to negotiate and implement access and benefit-sharing agreements for genetic resources and associated traditional knowledge.

Protect biogenetic resources and related traditional knowledge

The protection for wild genetic resources has been formalized, and 20 protection sites for chrysantha have been constructed; guidance is provided for demonstration enterprises to expand the nursery of Siraitia grosvenorii and Camellia nitidissima, which cover an area of 2,000 square metres and 500 square metres respectively.

The project helped to increase the area allocated for growing seedlings of Siraitia grosvenorii and Camellia nitidissima genetic resources, and planted Camellia nitidissima in the wild.

Reducing the utilization of wild resources is key to project success.

Conduct a baseline survey on biological genetic resources and related traditional knowledge

The project team investigated, collected, and summarized the protection, development, utilization, and benefit-sharing of 30 exemplar genetic resources in Guangxi, carried out case investigations and research on the development and utilization of traditional knowledge related to genetic resources of five ethnic minorities in Guangxi Zhuang, including Zhuang, Yao, Maonan, Mulao and Jing ethnic groups.

The establishment of a database for biogenetic resources and their related traditional knowledge in Guangxi, together with the Survey on the Status Quo of Biogenetic Resources and Their Development and Utilization in Guangxi and the Management Requirements, Guangxi Traditional Knowledge Case Study Report and Guangxi Traditional Knowledge Cataloging Report.

The provision of scientific guidance is required for the proper protection, development, utilization and sharing of biogenetic resources in Guangxi.

Improve the construction of the access and benefit-sharing system for biogenetic resources

Guangxi establishes a cross-sectoral coordination and cooperation mechanism and a stakeholder coordination mechanism.  A management mechanism for access and benefit sharing of biogenetic resources is established under the comprehensive governance of the department in charge of ecology and environment and the supervision of the departments related to development and reform, agriculture and rural areas, forestry, etc. The project management is carried out at the provincial, municipal, and county levels so joint efforts can be made in ensuring the access and benefit-sharing of biological heritage resources.

Experts from 31 universities, research institutes, and other relevant units, such as Minzu University of China, Chinese Research Academy of Environmental Sciences, Guangxi University, were hired to form a provincial technical expert team to provide consultation and technical support for the access and benefit-sharing of biogenetic resources in Guangxi.

It is necessary to improve the construction of the access and benefit-sharing system for biogenetic resources.

Restocking

Since no population increase has been observed two years after the threat mitigation actions, in 2014 we launched a four-year restocking project aimed at increasing the population size.  
The project involves the collection in the wild of a fraction (30-40%) of Bombina pachypus population at the egg stage, their development in captivity and the subsequent release of metamorphs in the same site of collection.

 

All the ex-situ management of toads was implemented at Fondazione Bioparco facilities where individuals were kept until the ventral coloration pattern is fully defined so that they can be photographically marked for future identification and demographic studies in the wild.

 

Overall, 67 young individuals were released (20 in 2014, 19 in 2015, 16 in 2016 and 12 in 2017).

 

Post-release monitoring revealed that the toad recapture rate was highly variable over the years. In 2018, we re-captured a total of 21 individuals: 10 released in 2014, two in 2015, four in 2016 and five in 2017. The pristine population remained stable (13 individuals) with few new animals recruited and some losses. At the end of 2018, a net increase of 21 individuals released plus some from natural recruitment allowed the original population size to double.

The production of individuals one year old from the egg stage requires adequate facilities and a high commitment of personnel.

Monitoring the success of restocking needs a multi-year project and adequate effort (personnel and economic).

The release of metamorph individuals close to sexual maturity allowed individual recognition by ventral coloration pattern and should have significantly decreased the mortality rate that is known to peak at the egg and larval stages.

Toads bred in captivity can be used for the restocking of declining populations of Bombina pachypus.
Restocking should be done by releasing individuals in distinct phases along a multi-year project to overcome possible failure due to stochastic or unpredictable events.

The identification of the true causes behind the high inter-annual variability in the individual recapture rate and the failure to recapture many released animals (e.g. death or dispersal) can be very difficult, even at the local scale and with a high sampling effort.

 

Threat Mitigation

Before any concrete conservation action that involve traslocation of individuals (with or without ex-situ reproduction) an assessment of the occurring threats and their mitigation/eradication is mandatory for the success of the actions.

Since the main threats observed for the species at the study site were the high risk of pond desiccation in the early stage of the breeding season (i.e., June) and alteration of the ponds by wild boars, two main conservation actions were carried out in 2012 to mitigate them: 
- four additional pools at each site fed by perennial springs were constructed to extend the hydro period from March to October;
- each puddle was fenced to prevent wild boars from using them for drinking and bathing. 

A thorough knowledge of the species biology and ecology is needed to exhaustively uncover and depict the effective and potential threats acting and impacting the conservation status of the target species.

The mitigation / eradication of the main threats that impact the conservation of the target populations may be insufficient to achieve a significant impact (i.e. a reversal of the negative trend) in the short / medium term. It is possible that mitigation actions must be coupled with concrete conservation interventions that involve the translocation of individuals to increase the size of populations in the short term. The possibility of not observing impacts from threat mitigation actions in the short term is more likely if the target species is long-lived and has long generation rates. In fact, Bombina pachypus is a long-lived species, being able to reach about 30 years of age.