Long-term effects of shade and input levels on coffee yields in the Pacific region of Nicaragua

The suitability and profitability of coffee cultivation in Central America are at risk due to pest and disease outbreaks, price fluctuations and climate change. Proper shading is claimed to be one of the most promising practices to seek sustainability and better adapt coffee cultivation to climate change in marginal areas. This study recorded and compared coffee cherry yields over a ten-year period from shaded coffee (N-fixing-trees and timber trees) agroforestry systems under different management regimes (conventional vs. organic) in a suboptimal site. Significant differences in production were detected between conventional inputs vs. combination of organic inputs and shade types in some years of the evaluation period. Full-sun cultivation under intensive management was the most productive system for coffee yields, followed by shaded systems under timber trees. Interestingly, and regardless of management systems (intensive conventional or intensive organic) the worst combinations in terms of coffee yield were shaded systems under leguminous species (Inga laurina (Sw.) Willd. + Simarouba glauca DC.). Across all experimental plots, the timber species Simarouba glauca and Tabebuia rosea (Bertol.) DC. grew well, reaching a mean annual increment in diameter of 2.5-3.3 cm/year (age 12 years). Average gross revenues were higher in full-sun and timber-shaded agroforestry systems. Overall, intensive management regimes were the most expensive cultivation system to run but also the best in terms of coffee yield performance.

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Intensive forest management — does it pay off financially on drained peatlands?

Canadian Journal of Forest Research ◽

10.1139/cjfr-2019-0007 ◽

2019 ◽

Vol 49 (9) ◽

pp. 1101-1113 ◽

Cited By ~ 2

Author(s):

Anssi Ahtikoski ◽

Hannu Hökkä

Keyword(s):

Stand Structure ◽

Active Management ◽

Considerable Proportion ◽

Intensive Management ◽

Annual Increment ◽

Management Options ◽

Data Set ◽

Site Type ◽

Management Regime ◽

Management Regimes

There are only a few studies focusing on the financial aspects of management regimes on peatland forests and even fewer studies investigating intensive management. Such studies, however, are urgently needed, particularly in Finland, where a considerable proportion of drained peatlands is reaching a phase requiring active management. An empirical data set derived from the 10th National Forest Inventory (NFI10) is applied for stand-level simulations (MOTTI stand simulator) until final cut. The data are a representative sample of the most common drained peatland site types and their current stand structures in Finland. Based on several different initial stand conditions, tree growth was projected according to four management regimes: (1) passive management (only one clearcut executed), (2) management according to prevailing silvicultural recommendations, (3) stand-level optimum without ditch network maintenance (DNM) and fertilization (FERT), and (4) stand-level optimum with DNM and FERT (intensive management). The intensive management regime financially outperformed the other management options distinctively, regardless of the climatic region, peatland site type, and initial stand structure. However, towards more harsh climatic conditions and a more barren site type, the financial difference between management options flattened out, and silvicultural recommendations even resulted in a higher mean annual increment (MAI) compared with intensive management.

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The geography of climate migration

Journal of Demographic Economics ◽

10.1017/dem.2021.6 ◽

2021 ◽

pp. 1-37

Author(s):

Michał Burzyński ◽

Frédéric Docquier ◽

Hendrik Scheewel

Keyword(s):

Climate Change ◽

International Migration ◽

First Century ◽

Long Term Effects ◽

Mobility Data ◽

Rural And Urban ◽

Working Age ◽

Internal Mobility ◽

Almost All

Abstract In this paper, we investigate the long-term effects of climate change on the mobility of working-age people. We use a world economy model that covers almost all the countries around the world, and distinguishes between rural and urban regions as well as between flooded and unflooded areas. The model is calibrated to match international and internal mobility data by education level for the last 30 years, and is then simulated under climate change variants. We endogenize the size, dyadic, and skill structure of climate migration. When considering moderate climate scenarios, we predict mobility responses in the range of 70–108 million workers over the course of the twenty-first century. Most of these movements are local or inter-regional. South–South international migration responses are smaller, while the South–North migration response is of the “brain drain” type and induces a permanent increase in the number of foreigners in OECD countries in the range of 6–9% only. Changes in the sea level mainly translate into forced local movements. By contrast, inter-regional and international movements are sensitive to temperature-related changes in productivity. Lastly, we show that relaxing international migration restrictions may exacerbate the poverty effect of climate change at origin if policymakers are unable to select/screen individuals in extreme poverty.

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Projections of Local Knowledge-Based Adaptation Strategies of Mexican Coffee Farmers

Climate ◽

10.3390/cli9040060 ◽

2021 ◽

Vol 9 (4) ◽

pp. 60

Author(s):

Patricia Ruiz-García ◽

Cecilia Conde-Álvarez ◽

Jesús David Gómez-Díaz ◽

Alejandro Ismael Monterroso-Rivas

Keyword(s):

Climate Change ◽

Extreme Events ◽

Local Knowledge ◽

Production Systems ◽

Agroforestry Systems ◽

Southern Mexico ◽

Knowledge Based ◽

Coffee Farmers ◽

Extreme Hydrological Events ◽

Adaptation Policies

Local knowledge can be a strategy for coping with extreme events and adapting to climate change. In Mexico, extreme events and climate change projections suggest the urgency of promoting local adaptation policies and strategies. This paper provides an assessment of adaptation actions based on the local knowledge of coffee farmers in southern Mexico. The strategies include collective and individual adaptation actions that farmers have established. To determine their viability and impacts, carbon stocks and fluxes in the system’s aboveground biomass were projected, along with water balance variables. Stored carbon contents are projected to increase by more than 90%, while maintaining agroforestry systems will also help serve to protect against extreme hydrological events. Finally, the integration of local knowledge into national climate change adaptation plans is discussed and suggested with a local focus. We conclude that local knowledge can be successful in conserving agroecological coffee production systems.

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MaxEnt Modeling Based on CMIP6 Models to Project Potential Suitable Zones for Cunninghamia lanceolata in China

Forests ◽

10.3390/f12060752 ◽

2021 ◽

Vol 12 (6) ◽

pp. 752

Author(s):

Yichen Zhou ◽

Zengxin Zhang ◽

Bin Zhu ◽

Xuefei Cheng ◽

Liu Yang ◽

...

Keyword(s):

Climate Change ◽

Species Distribution ◽

Water Conservation ◽

Critical Role ◽

Cunninghamia Lanceolata ◽

Distribution Area ◽

Timber Species ◽

Diurnal Range ◽

The Future ◽

Suitable Area

Cunninghamia lanceolata (Lamb.) Hook. (Chinese fir) is one of the main timber species in Southern China, which has a wide planting range that accounts for 25% of the overall afforested area. Moreover, it plays a critical role in soil and water conservation; however, its suitability is subject to climate change. For this study, the appropriate distribution area of C. lanceolata was analyzed using the MaxEnt model based on CMIP6 data, spanning 2041–2060. The results revealed that (1) the minimum temperature of the coldest month (bio6), and the mean diurnal range (bio2) were the most important environmental variables that affected the distribution of C. lanceolata; (2) the currently suitable areas of C. lanceolata were primarily distributed along the southern coastal areas of China, of which 55% were moderately so, while only 18% were highly suitable; (3) the projected suitable area of C. lanceolata would likely expand based on the BCC-CSM2-MR, CanESM5, and MRI-ESM2-0 under different SSPs spanning 2041–2060. The increased area estimated for the future ranged from 0.18 to 0.29 million km2, where the total suitable area of C. lanceolata attained a maximum value of 2.50 million km2 under the SSP3-7.0 scenario, with a lowest value of 2.39 million km2 under the SSP5-8.5 scenario; (4) in combination with land use and farmland protection policies of China, it is estimated that more than 60% of suitable land area could be utilized for C. lanceolata planting from 2041–2060 under different SSP scenarios. Although climate change is having an increasing influence on species distribution, the deleterious impacts of anthropogenic activities cannot be ignored. In the future, further attention should be paid to the investigation of species distribution under the combined impacts of climate change and human activities.

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Early-life temperature modifies adult encapsulation response in an invasive ectoparasite

Parasitology ◽

10.1017/s0031182015000591 ◽

2015 ◽

Vol 142 (10) ◽

pp. 1290-1296 ◽

Cited By ~ 6

Author(s):

SIRPA KAUNISTO ◽

LAURA HÄRKÖNEN ◽

MARKUS J. RANTALA ◽

RAINE KORTET

Keyword(s):

Climate Change ◽

High Temperature ◽

Low Temperature ◽

Blood Feeding ◽

Life Cycles ◽

Extreme Weather Events ◽

Favourable Effect ◽

Temperature Peak ◽

Long Term Effects ◽

High Temperature Peak

SUMMARYImmunity of parasites has been studied amazingly little, in spite of the fact that parasitic organisms, especially the arthropod parasites, need immunity to survive their own infections to successfully complete life cycles. Long-term effects of challenging environmental temperatures on immunity have remained unstudied in insects and parasites. Our study species, the deer ked (Lipoptena cervi; Linnaeus 1758), is an invasive, blood-feeding parasitic fly of cervids. Here, it was studied whether thermal stress during the pupal diapause stage could modify adult immunity (encapsulation capacity) in L. cervi. The effect of either a low temperature or high temperature peak, experienced during winter dormancy, on encapsulation response of active adult was tested. It was found that low temperature exposure during diapause, as long as the temperature is not too harsh, had a favourable effect on adult immunity. An abnormal, high temperature peak during pupal winter diapause significantly deteriorated the encapsulation capacity of emerged adults. The frequency and intensity of extreme weather events such as high temperature fluctuations are likely to increase with climate change. Thus, the climate change might have previously unknown influence on host-ectoparasite interactions, by affecting ectoparasite's immune defence and survival.

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Distribution and Abundance of Double-crested Cormorants Nesting in the Interior of California, 2009–2012

Western Birds ◽

10.21199/wb51.4.1 ◽

2020 ◽

Vol 51 (4) ◽

pp. 270-292

Author(s):

W. David Shuford ◽

Kathy C. Molina ◽

John P. Kelly ◽

T. Emiko Condeso ◽

Daniel S. Cooper ◽

...

Keyword(s):

Climate Change ◽

Sonoran Desert ◽

Central Valley ◽

The State ◽

Salton Sea ◽

Limited Data ◽

Long Term Effects ◽

Human Needs ◽

Large Fluctuations

As part of an 11-state inventory, we censused the Double-crested Cormorant (Phalacrocorax auritus) in the interior of California from 2009 to 2012, using a combination of aerial, ground, and boat surveys. An estimated 8791 pairs breeding in the interior of the state in 2009–2012 exceeded the 7170 pairs estimated in 1998–1999. In both periods, cormorants were breeding in 9 of 11 ecoregions, but three-fourths were at one site—Mullet Island at the Salton Sea in the Sonoran Desert ecoregion (abandoned in 2014). The ecoregions with the next highest proportions were the Sacramento Valley, San Joaquin Valley, and Modoc Plateau. The apparent increase in numbers and colony sites since 1999—consistent with the pattern through much of western North America—reflects the (short-lived) increase in numbers at the Salton Sea, an increasing number of colonies and breeding pairs in the Central Valley, and slightly better coverage on the recent surveys. Because of practical survey constraints and limited data to date, evidence of change in numbers of Doublecrested Cormorants breeding in the interior of California between 1998–1999 and 2009–2012 is inconclusive. Plans for monitoring will need to take into account the effects of substantial annual variation in numbers, which may be associated with large fluctuations in cormorants’ prey base, short-term cycles of drought and flood, shifts of nesting cormorants into or out of the interior of California, and the expectation of greater environmental fluctuations with continuing climate change. The factors most likely to limit the number of cormorants breeding in the interior of the state are habitat loss or alteration (particularly from reallocation of water for human needs), disease, human disturbance, and the long-term effects of climate change.

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Land in Central America will become less suitable for coffee cultivation under climate change

Regional Environmental Change ◽

10.1007/s10113-021-01803-0 ◽

2021 ◽

Vol 21 (3) ◽

Author(s):

Leonel Lara-Estrada ◽

Livia Rasche ◽

Uwe A. Schneider

Keyword(s):

Climate Change ◽

Central America ◽

Relative Concentration ◽

Land Suitability ◽

Land Evaluation ◽

Climate Change Scenarios ◽

Coffee Production ◽

Policy Makers ◽

Goods And Services ◽

Coffee Cultivation

AbstractCoffee cultivation in Central America provides goods and services at local, national, and international levels. Climate change is likely to affect the magnitude and continuity of these benefits by reducing the land suitability for coffee cultivation. To quantify the impacts of climate change on land suitability, we use the Bayesian network model Agroecological Land Evaluation for Coffea arabica L. (ALECA) and estimate the land suitability for coffee production in 2000, 2050, and 2080 under three climate change scenarios based on relative concentration pathways (RCPs) 2.6, 4.5, and 8.5. Results indicate that even under the less severe climate scenarios, over half of the current coffee area in Central America will experience a decline in its land suitability for coffee production, from excellent or good to moderate and marginal, and that the change will not happen in the more distant future of 2080, but by 2050. Under RCP 8.5, most coffee areas become of marginal and moderate suitability. The findings show that the continuity of coffee cultivation in a large portion of coffee areas in Central America is under threat and that farmers and policy-makers should develop adaptation portfolios for their farms and regions in a timely manner.

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The Use of Homegarden Agroforestry Systems for Climate Change Mitigation in Lowlands of Southern Tigray, Northern Ethiopia

Asian Soil Research Journal ◽

10.9734/asrj/2019/v2i230049 ◽

2019 ◽

pp. 1-13

Author(s):

Gebru Eyasu Siyum ◽

Tuemay Tassew

Keyword(s):

Climate Change ◽

Species Diversity ◽

Climate Change Mitigation ◽

Woody Species ◽

Agroforestry Systems ◽

Carbon Stocks ◽

Land Uses ◽

Woody Species Diversity ◽

Soil Carbon Stocks ◽

Change Mitigation

Mitigation of climate change is one of the major environmental challenges facing the globe. In this context, homegarden agroforestry systems (HGAFs) have large potential for climate change mitigation. Therefore, this study was initiated to estimate the biomass and soil carbon stocks of HGAFs in relation to adjacent Natural Forest (NF). It also analyzed the relationship between woody species diversity, evenness and richness with biomass and soil carbon stocks. Three sites were purposely selected on the basis of the presence of HGAFs and NF adjacent to each other. Random sampling was used to select representative homegardens from the study population. In NF, a systematic sampling technique was employed. A total of 60 plots with a size of 10 m x 20 m were used to collect vegetation and soil data in both land uses. Soil samples were collected from each plot of the samples laid for vegetation sampling. Accordingly, 120 composite and 120 undisturbed soil samples from 0-30 cm and 30-60 cm soil depths were collected for soil organic carbon (SOC) and bulk density analysis respectively. Biomass estimation for each woody species was analyzed by using appropriate allometric equations. The result showed that the total amount of carbon stocks was 148.32±35.76 tons ha-1 and 157.27±51.61 tons ha-1 in HGAFs and adjacent NF respectively which did not vary significantly between the two studied land uses (P > 0.05). The finding also shows a positive but non-significant (P>0.05) relationship between carbon stocks and woody species diversity, richness, and evenness. Specifically, in NF lands, woody species diversity with SOC (r=0.36) and in HGAFs species richness with biomass carbon (r=0.39) was correlated positively and significantly (P=0.05). We concluded that HGAFs have the same potential as the NF for carbon stock accumulation and to counteract the loss of biomass.

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Assessing the long term effects on climate change of metallurgical slags valorization as construction material: a comparison between static and dynamic global warming impacts

Mathematical Biosciences and Engineering ◽

10.3934/ctr.2021005 ◽

2021 ◽

Vol 1 (1) ◽

pp. 88-111

Author(s):

Andrea Di Maria ◽

◽

Annie Levasseur ◽

Karel Van Acker ◽

◽

...

Keyword(s):

Climate Change ◽

Global Warming ◽

Carbon Footprint ◽

Building Materials ◽

Construction Material ◽

Steel Slag ◽

Construction Materials ◽

Long Term Effects ◽

Stainless Steel Slag ◽

Environmental Evaluation

<abstract> <p>The interest in circular economy for the construction sector is constantly increasing, and Global Warming Potential (GWP) is often used to assess the carbon footprint of buildings and building materials. However, GWP presents some methodological challenges when assessing the environmental impacts of construction materials. Due to the long life of construction materials, GWP calculation should take into consideration also time-related aspects. However, in the current GWP, any temporal information is lost, making traditional static GWP better suited for retrospective assessment rather than forecasting purposes. Building on this need, this study uses a time-dependent GWP to assess the carbon footprint of two newly developed construction materials, produced through the recycling of industrial residues (stainless steel slag and industrial goethite). The results for both materials are further compared with the results of traditional ordinary Portland cement (OPC) based concrete, presenting similar characteristics. The results of the dynamic GWP (D_GWP) are also compared to the results of traditional static GWP (S_GWP), to see how the methodological development of D_GWP may influence the final environmental evaluation for construction materials. The results show the criticality of the recycling processes, especially in the case of goethite valorization. The analysis shows also that, although the D_GWP did not result in a shift in the ranking between the three materials compared with S_GWP, it provides a clearer picture of emission flows and their effect on climate change over time.</p> </abstract>

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