Understanding mast seeding for conservation and land management

Masting, the intermittent and synchronous production of large seed crops, can have profound consequences for plant populations and the food webs that are built on their seeds. For centuries, people have recorded mast crops because of their importance in managing wildlife populations. In the past 30 years, we have begun to recognize the importance of masting in conserving and managing many other aspects of the environment: promoting the regeneration of forests following fire or other disturbance, conserving rare plants, conscientiously developing the use of edible seeds as non-timber forest products, coping with the consequences of extinctions on seed dispersal, reducing the impacts of plant invasions with biological control, suppressing zoonotic diseases and preventing depredation of endemic fauna. We summarize current instances and future possibilities of a broad set of applications of masting. By exploring in detail several case studies, we develop new perspectives on how solutions to pressing conservation and land management problems may benefit by better understanding the dynamics of seed production. A lesson common to these examples is that masting can be used to time management, and often, to do this effectively, we need models that explicitly forecast masting and the dynamics of seed-eating animals into the near-term future. This article is part of the theme issue ‘The ecology and evolution of synchronized seed production in plants’.

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Inter-annual variation in seed production has increased over time (1900–2014)

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2017.1666 ◽

2017 ◽

Vol 284 (1868) ◽

pp. 20171666 ◽

Cited By ~ 30

Author(s):

Ian S. Pearse ◽

Jalene M. LaMontagne ◽

Walter D. Koenig

Keyword(s):

Seed Production ◽

Seed Set ◽

Global Climate ◽

Mast Seeding ◽

Plant Seed ◽

Subtle Change ◽

Animal Populations ◽

Wide Range ◽

Seed Crops ◽

Over Time

Mast seeding, or masting, is the highly variable and spatially synchronous production of seeds by a population of plants. The production of variable seed crops is typically correlated with weather, so it is of considerable interest whether global climate change has altered the variability of masting or the size of masting events. We compiled 1086 datasets of plant seed production spanning 1900–2014 and from around the world, and then analysed whether the coefficient of variation (CV) in seed set, a measure of masting, increased over time. Over this 115-year period, seed set became more variable for plants as a whole and for the particularly well-studied taxa of conifers and oaks. The increase in CV corresponded with a decrease in the long-term mean of seed set of plant species. Seed set CV increased to a greater degree in plant taxa with a tendency towards masting. Seed set is becoming more variable among years, especially for plant taxa whose masting events are known to affect animal populations. Such subtle change in reproduction can have wide-ranging effects on ecosystems because seed crops provide critical resources for a wide range of taxa and have cascading effects throughout food webs.

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The ecology and evolution of synchronized reproduction in long-lived plants

Philosophical Transactions of the Royal Society B Biological Sciences ◽

10.1098/rstb.2020.0369 ◽

2021 ◽

Vol 376 (1839) ◽

Cited By ~ 2

Author(s):

Mario B. Pesendorfer ◽

Davide Ascoli ◽

Michał Bogdziewicz ◽

Andrew Hacket-Pain ◽

Ian S. Pearse ◽

...

Keyword(s):

Seed Production ◽

Predictive Modelling ◽

Ecosystem Dynamics ◽

Mast Seeding ◽

Plant Reproductive Success ◽

Proximate Mechanisms ◽

Human Interactions ◽

Molecular Approaches ◽

Ontogenetic Trajectory ◽

Seed Crops

Populations of many long-lived plants exhibit spatially synchronized seed production that varies extensively over time, so that seed production in some years is much higher than on average, while in others, it is much lower or absent. This phenomenon termed masting or mast seeding has important consequences for plant reproductive success, ecosystem dynamics and plant–human interactions. Inspired by recent advances in the field, this special issue presents a series of articles that advance the current understanding of the ecology and evolution of masting. To provide a broad overview, we reflect on the state-of-the-art of masting research in terms of underlying proximate mechanisms, ontogeny, adaptations, phylogeny and applications to conservation. While the mechanistic drivers and fitness consequences of masting have received most attention, the evolutionary history, ontogenetic trajectory and applications to plant–human interactions are poorly understood. With increased availability of long-term datasets across broader geographical and taxonomic scales, as well as advances in molecular approaches, we expect that many mysteries of masting will be solved soon. The increased understanding of this global phenomenon will provide the foundation for predictive modelling of seed crops, which will improve our ability to manage forests and agricultural fruit and nut crops in the Anthropocene. This article is part of the theme issue ‘The ecology and evolution of synchronized seed production in plants’.

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Seed production of sugar maple and American beech in northern hardwood forests, New Hampshire, USA

Canadian Journal of Forest Research ◽

10.1139/cjfr-2017-0096 ◽

2017 ◽

Vol 47 (7) ◽

pp. 985-990 ◽

Cited By ~ 8

Author(s):

Natalie L. Cleavitt ◽

Timothy J. Fahey

Keyword(s):

Seed Production ◽

Tree Species ◽

Sugar Maple ◽

Hardwood Forests ◽

Mast Seeding ◽

Plant Resources ◽

American Beech ◽

Northern Hardwood Forests ◽

Northern Hardwood ◽

Seed Crops

Mast seeding is the synchronous production of large seed crops in plant populations and for many tree species is known to be determined by the interaction between weather cues and internal plant resources. We use a 24-year record of seedfall for sugar maple (Acer saccharum Marsh.) and American beech (Fagus grandifolia Ehrh.) across a northern hardwood forest landscape to quantify their masting patterns and explore the relationship between mast years, resources, and weather cues, particularly the difference between summer temperatures in the two years prior to the seedfall year (ΔT). We found clear evidence of masting in these species, and mast years were often coincident in the two species; masting was best predicted by ΔT or ΔT plus previous-year seedfall. We saw no evidence for correspondence of masting in these trees to precipitation cues. A soil calcium addition modified elevation effects on seed production. Clarification of the controls on mast seeding for these important tree species will aid in predicting such resources as mast for wildlife and maple sugar production in northern hardwood forests.

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Illegal rattan extraction trends in the Ankasa Conservation Area in Ghana

Journal of Energy and Natural Resource Management ◽

10.26796/jenrm.v2i3.49 ◽

2018 ◽

Vol 2 (3) ◽

pp. 84-92

Author(s):

R. Obour, D. Amankwaa, A. Asare

Keyword(s):

Protected Areas ◽

Biological Diversity ◽

Forest Products ◽

Simple Random Sampling ◽

Sampling Techniques ◽

Snowball Sampling ◽

Conservation Area ◽

Forest Reserve ◽

The North ◽

Non Timber Forest Products

Protected Areas (PAs) are created for the protection and maintenance of biological diversity, but many of Ghana’s PAs are subjectto severe pressures and threats, the main pressures being the illegal extraction of natural resources. Rattans are indisputablyone of the most important Non-Timber Forest Products (NTFPs) in Ghana’s Protected Areas that is without doubt one of thereasons for which it has drawn the attention of researchers. In this study the illegal rattan extraction patterns in the AnkasaConservation Area (ACA) in Ghana was inspected. Simple random sampling and Snowball sampling techniques were used. Datacollection employed the use of semi-structured questionnaires, interviews and field enumeration of rattans as well as an analysisof Effective Patrol Man-days (EPMDS) from 2004 to 2012. The results showed a significant positive correlation (r = 0.75, p<0.05, r2 = 0.557) between patrol effort and rattan extraction encounters. In addition, there was a general reduction in illegalrattan extraction encounters from 2004 to 2012 at a rate of 4.3 per year. The highest illegal rattan extraction incidences wererecorded in 2006 (76 encounters), 2005 (35 encounters), 2008 (22 encounters), 2004 (18 encounters) and the least incidencewere recorded in both 2010 (3 encounters) and 2011 (3 encounters).The research also revealed that Eremospatha macrocarpawas the most extracted rattan species followed by Laccosperma secundiflorum. The major rattan extraction and trade routesoriginate in the northern parts and in the area east of the reserve and also south of Draw River Forest Reserve. Generally, rattanpoaching in Ankasa Conservation Area has declined, but there are still human incursions in the northern part of the reserve. Thestudy recommended an intensification of patrols in the north of the reserve. Also, enrichment planting and Agroforestry practicesof inter-cropping rattans with seasonal crops should be pursued vigorously for the local communities.

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Market Survey of Non-Timber Forest Products in the Sunyani Municipality

Journal of Energy and Natural Resource Management ◽

10.26796/jenrm.v3i2.58 ◽

2018 ◽

Vol 3 (2) ◽

pp. 44-53

Author(s):

S.D. Akoto

Keyword(s):

Building Materials ◽

Significant Proportion ◽

Forest Products ◽

Packaging Materials ◽

Medicinal Products ◽

Monthly Basis ◽

Rural Livelihood ◽

Non Timber Forest Products ◽

Communal Lands ◽

Forest Lands

This study sought to: (1) identify the types and sources of Non-Timber Forest Products (NTFPs) traded; (2) find the frequencyof the NTFPs trade and (3) identify the challenges in NTFPs trading in the Sunyani Municipality. The survey was carried outfrom February, 2014 to April, 2014 mainly at the Sunyani Central and Nana Bosoma Markets in the Sunyani Municipality. Thetarget population comprised NTFPs collectors (gatherers), sellers and consumers. Respondents were purposively sampled. Atotal of 100 respondents were engaged in this study. The NTFPs were grouped into six categories namely; food, medicine,building materials, packaging materials, artefacts and domestic utensils. Key informants’ interviews were also conducted atthe Sunyani Forest Services Division to triangulate the data already gathered. Statistical Package for Social Sciences was usedto analyze the data obtained. The study demonstrated that domestic utensils (37%), food (33%), medicinal products (12%),packaging materials (9%), artefacts (6%) and building materials (3%) were the types of NTFPs traded in the two market centers.The results also showed that majority of the respondents (77%) harvest their NTFPs from forest lands as against 23% whoharvest from communal lands. A significant proportion of the respondents (52%) traded in above 40 kg of NTFPs and only 4%were seen trading in 10 kg of NTFPs. The study further highlighted that food (28%) and domestic utensils (26%) were regularlybrought to the market centers on weekly basis whilst significant proportions of medicinal products (9%), building materials(3%) and artefacts (4%) were brought to the market venues on monthly basis. Cumbersome permit procedure (40%), increasedmarket demand (15%) and financial constraints (20%) were identified as some of the challenges encountered in NTFPs tradingin the Sunyani Municipality. To ensure strict monitoring and sustainability of the resource, there is the need for sensitizationprogramme on the importance of NTFPs in rural livelihood and why their conservation is vital in meeting the needs of thepresent generation whilst not undermining their potential in supplying the needs of future generations.

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