Henrik Meilby

University of Copenhagen

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Thorsten Treue

University of Copenhagen

Ida Theilade

University of Copenhagen

Carsten Smith‐Hall

University of Copenhagen

Martin Reinhardt Nielsen

University of Copenhagen

Bo Jellesmark Thorsen

University of Copenhagen

Niels Strange

University of Copenhagen

Rasoul Yousefpour

University of Freiburg

Jette Bredahl Jacobsen

University of Copenhagen

Santosh Rayamajhi

Tribhuvan University

Suresh Kumar Ghimire

Tribhuvan University

Cooperative Institutions

University of Copenhagen

Tribhuvan University

Sokoine University of Agriculture

John Wiley & Sons (United States)

National Institute of Amazonian Research

Royal Agricultural University

Wageningen University & Research

ForestGEO

Natural Sciences and Engineering Research Council

Université du Québec à Montréal

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Determination of a density-dependent mortality function for Virola pavonis (A.DC.) A.C. Sm

Henrik Meilby

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Ancient Agropastoral System of the Bolivian Altiplano: a Robust Ecosystem Endangered from Changes in Land-use

Sustainable Agriculture Research (2018)

Sarah Jennifer D'Apollonia Henrik Meilby Marten Sørensen

The current study examines the challenges and constraints faced by rural, small-herd, llama (Lama glama) agropastoralists of the Bolivian Altiplano. Three different study sites with various degrees of agropastoralism were examined in order to describe the relationship between quinoa (Chenopodium quinoa) and llama production and the implications of land use competition between these two livelihoods. In order to document the impact of land use change, the study also examined the native forage species available to free grazing llamas and their relative importance. Llama pastoralists were interviewed and completed a survey on the perceived importance of native forage plants in grazing llama diets as well as the perceived constraints to llama husbandry. The relative frequency of citation (RFC) index was employed as a measure of relative importance of different native forage plant species. This data was supplemented with further primary data collected from the field using mixed methods involving participatory rural appraisal techniques (PRA), interviews and focus groups. Secondary data was collected from an in-depth literature review, government offices and other relevant institutions. The study presents a detailed list of all cited native forage species and their perceived importance as a forage crop and any ethnoveterinary uses. The results reveal that challenges and constraints can often be site-specific, and a lack of forage throughout the dry season (May to November) was a general constraint among study sites. Quinoa production was found to be in direct competition with llama husbandry, with many sites demonstrating s shift away from llama pastoralism.

Pastoralism

Fencing

Participatory rural appraisal

Animal Husbandry

10.22004/ag.econ.301842

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Does resource availability coincide with exploitation patterns? Inference from distribution and trade of Neopicrorhiza scrophulariiflora (Pennell) D.Y. Hong in the Nepalese Himalayas

Journal of Applied Research on Medicinal and Aromatic Plants (2021)

Mukti Ram Poudeyal Dipesh Pyakurel Santosh Kumar Rana Henrik Meilby Yagya Raj Paneru

10.1016/j.jarmap.2021.100292

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Plant density and life history traits of Aconitum spicatum in North-central Nepal: effects of elevation and anthropogenic disturbances

PeerJ (2019)

Deep Jyoti Chapagain Henrik Meilby Suresh Kumar Ghimire

Increasing cross-border trade of medicinal and aromatic plants (MAPs) has put heavy pressure on a considerable number of species in the Himalayas. One of the threatened species in Nepal is Aconitum spicatum . Unfortunately for this species and for many others, our knowledge on population ecology and performance across the distribution range is insufficient, hindering the formulation of species-specific management plans. We therefore studied density and population structure of A. spicatum and assessed variation in its life history traits among three populations (subalpine, lower alpine and alpine) along an elevation gradient (3,000–4,200 m a.s.l.) in Annapurna Conservation Area, north-central Nepal. The results show that human disturbances and topographic factors contributed to the variation in density and life history traits. The overall density ranged between 0.56 ± 0.09 (Mean ± SE) and 2.48 ± 0.24 plants/m 2 with highest mean density in the lower alpine and lowest in the subalpine population. The subalpine population was also characterized by lower investment in reproductive structures with lowest seed mass and low seed viability and fecundity. Among the environmental variables tested, harvesting, animal droppings and fire appeared to be the most important factors affecting density of different life stages of A. spicatum . The prevailing harvesting pattern is destructive as it involves uprooting of the whole plant and this appears to be a main reason for low recruitment and reduced density of the subalpine population. The level of disturbance decreased with increasing elevation. In terms of reproductive effort, the alpine population performed best. Our results indicate that the viability of A. spicatum populations depends on controlling over-harvesting and pre-mature harvesting of tubers and protecting younger life stages from grazing, trampling and fire. We therefore recommend that when formulating management guidelines, measures aiming to mitigate such anthropogenic disturbances should be considered.

Population density

Life History Theory

Vital rates

Density dependence

10.7717/peerj.7574

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Citations (7)

A review of decision-making approaches to handle uncertainty and risk in adaptive forest management under climate change

Annals of Forest Science (2011)

Rasoul Yousefpour Jette Bredahl Jacobsen Bo Jellesmark Thorsen Henrik Meilby Marc Hanewinkel

This review paper provides an overview of approaches to which we may resort for handling the complex decision problems involving uncertainty and risk that climate change implies for forest managers. Modelling approaches that could support adaptive management strategies seem to be called for, not only as climate change denotes increased economic uncertainty but also because new and more reliable information becomes available as time passes and climate changes. The paper (1) provides a broad overview of state-of-the-art methods for optimal decision making under risk and uncertainty in forestry and (2) elaborates on the possible use of these methods in adaptive forest management under climate change. A survey of the current literature is carried out to identify approaches and developments that may prove most promising in relation to different challenges to the adaptive management of forest ecosystems under climate change. Most studies focusing on changing, typically increasing, risks in forest management under climate change tend to build on existing approaches about changes in risk levels contingent on climate change scenarios. Finally, we discuss what to emphasise in future studies to improve the understanding of adaptive forest management and decision support tools needed to cope with climate change.

Adaptive Management

Ecosystem Management

10.1007/s13595-011-0153-4

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Citations (198)

Ancient Agropastoral System of the Bolivian Altiplano: a Robust Ecosystem Endangered from Changes in Land-use

Sustainable Agriculture Research (2018)

Sarah Jennifer D'Apollonia Henrik Meilby Marten Sørensen

Pastoralism

Fencing

Participatory rural appraisal

10.5539/sar.v7n4p70

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Does commercialization of a non-timber forest product reduce ecological impact? A case study of the Critically Endangered Aquilaria crassna in Lao PDR

Oryx (2008)

Anders Boeck Jensen Henrik Meilby

Aquilaria crassna, a tree species on CITES Appendix II and categorized as Critically Endangered on the IUCN Red List, is the main source of the highly valuable, fragrant and resinous agarwood that is extracted in forests in South-east Asia, exported to East Asian and Arab countries, and used for a range of medicinal, aromatic and religious products. Based on interviews with local, non-local and foreign harvesters in Laos we examined the relationships between harvesters' daily net revenue from agarwood extraction, their degree of commercialization (i.e. their differential access to markets) and their ability to target harvesting towards the small fraction of trees that do contain commercial qualities and quantities of agarwood. For comparison we included data on number of trees felled during the most recent harvesting trip. The analysis showed that poor targeting ability and low degree of commercialization were associated with low daily net revenues, whereas good targeting ability and high degree of commercialization were associated with high daily net revenues. In the case of A. crassna in Laos it therefore appears that the activities of highly commercialized harvesters are less harmful to A. crassna populations than those of less specialized, local harvesters.

Agarwood

CITES

10.1017/s0030605308007825

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Citations (24)

Growth response to climatic change over 120 years for Alnus viridis and Salix glauca in West Greenland

Journal of Vegetation Science (2014)

Rasmus Halfdan Jørgensen Martin Hallinger Svenja Ahlgrimm Juliane Friemel Johannes Kollmann

Abstract Questions Which climatic variables are the main determinants of radial growth and to what extent does their effect on growth vary among species? What are the similarities between the temporal radial growth patterns of the two common shrub species, A lnus viridis and S alix glauca ? Do changing growth conditions over the past 120 yr and their predicted impact on growth match shrub expansion observed in the region? Location Arsuk F jord and D isko B ay regions, W G reenland. Methods A lnus viridis and S . glauca specimens were sampled in the field and radial growth was analysed using standard dendrochronological methods (‘response functions’). The identified climatic variables were applied to model radial growth using a linear mixed model and predict the growth for 1890–2010. Results The main determinants of radial growth were summer temperatures and, although not significant in the final models, spring precipitation. The empirical chronologies showed only somewhat similar growth patterns. They responded to similar sets of climatic variables, but their similarity was weakened because of the low number of replicates and local differences in growth conditions. The similarity between predicted (modelled) chronologies was higher, which was related to the response to similar sets of climatic variables and high correlation between climatic variables across long distances. Conclusion Overall, estimated growth did not increase over the past 120 yr, but considerable variations in growth are conspicuous and match known historical patterns of the A tlantic M ultidecadal O scillation. Perspectives regarding the observed shrub expansion in W Greenland are discussed, and based on the estimated growth patterns, we consider it unlikely that the recent 10–15‐yr period of favourable climate is the main responsible cause.

Similarity (geometry)

10.1111/jvs.12224

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Citations (20)

Examining the Consistency of Folk Identifications of Trees to Implement Community-Based Biodiversity Monitoring

Human Ecology (2020)

Nerea Turreira-García Søren Brofeldt Henrik Meilby Martin Reinhardt Nielsen Deden Girmansyah

Affect

Compromise

10.1007/s10745-020-00142-8

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Citations (2)

Community-Based Monitoring of Tropical Forest Crimes and Forest Resources Using Information and Communication Technology – Experiences from Prey Lang, Cambodia

Citizen Science Theory and Practice (2018)

Søren Brofeldt Dimitrios Argyriou Nerea Turreira-García Henrik Meilby Finn Danielsen

The use of smartphones for data collection has opened up new opportunities for communities wishing to engage in community-based monitoring. While information and communication technology (ICT) is able to systematize data collection, complex functions and observation types can present challenges for community members. ICT also may skew community participation towards young men, as they are sometimes more comfortable using smartphones. This study investigates the success and cost-effectiveness of having local forest monitors use ICT to collect data on forest crimes and forest resources in Prey Lang, Cambodia. A workshop was held with the Prey Lang Community Network to identify the resources and illegal activities to be monitored. Guided by the community members, a smartphone app was subsequently developed and a total of 36 community members were trained in its use. We examined the extent to which the capacity of community members to collect data was dependent upon the complexity of the ICT and on their age and gender. We also assessed the costs of the monitoring program over a two-year period. The community members were able to collect large amounts of data regardless of their gender or age. They made 10,842 entries of data on illegal logging and forest resources. Increased complexity of the app had no impact on the proportion of quality data collected. The cost of monitoring resembled other community-based monitoring programs but was notably less than for monitoring by professional foresters. Our findings suggest that local communities with little formal education are able to monitor forest crimes and forest resources cost-effectively using ICT; however, while the documentation collected was highly valuable, software and hardware maintenance, along with the digital data validation process, will continue to require external support.

10.5334/cstp.129

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Citations (47)