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5,700
AR6_WGII
1,848
4
Predominantly positive CO 2 fertilisation effects at current warming will change into increasingly negative effects of warming and drought on forests at higher temperatures
medium
1
train
5,701
AR6_WGII
1,848
6
Declines in pollinator ranges in response to climate change are occurring for many groups in Europe
high
2
train
5,702
AR6_WGII
1,848
9
Projected climate impacts on pollinators show mixed responses across Europe but are greater under 3°C GWL
medium
1
train
5,703
AR6_WGII
1,848
14
Soil erosion varies across Europe, with higher rates in parts of SEU and WCE, but lower rates in NEU
high
2
train
5,704
AR6_WGII
1,849
4
Projected increase in rainfall could increase soil erosion, while warming enhances vegetation cover, leading to overall mixed responses
medium
1
test
5,705
AR6_WGII
1,849
10
Lowering vulnerability by reducing other anthropogenic impacts (Gillingham et al., 2015), such as land-use change, habitat fragmentation (Eigenbrod et al., 2015; Oliver et al., 2017; Wessely et al., 2017), pollution and deforestation (Chapter 2), enhances adaptation capacity and biodiversity conservation
high
2
train
5,706
AR6_WGII
1,849
11
Protected areas, such as the EU Natura 2000 network, have contributed to biodiversity protection
medium
1
train
5,707
AR6_WGII
1,849
12
Most protected areas are static and thus do not take species migration into consideration
high
2
train
5,708
AR6_WGII
1,849
15
Their success will depend on consideration of the future climate niche when restoring peatlands (Bellis et al., 2021) or long-lived species with limited mobility
high
2
train
5,709
AR6_WGII
1,849
19
The capacity to implement and maintain these options remains limited, however
medium
1
train
5,710
AR6_WGII
1,849
22
Ecosystem-based adaptations (EbA) and NbS that restore or recreate ecosystems, build resilience and produce synergies with adaptation and mitigation in other sectors are increasingly used in Europe
high
2
train
5,711
AR6_WGII
1,850
1
Appropriately implemented ecosystem-based mitigation, such as reforestation with climate-resilient native species (Section 13.3.1.4), peatland and wetland restoration, and agroecology (Section 13.5.2), can enhance carbon sequestration or storage
medium
1
train
5,712
AR6_WGII
1,850
3
Trade-offs between ecosystem protection, their services and human adaptation and mitigation needs can generate challenges, such as loss of habitats, increased emissions from restored wetlands (Günther et al., 2020) and conflicts between carbon capture services, and provisioning of bioenergy, food, timber and water
medium
1
train
5,713
AR6_WGII
1,850
4
The solution space for responding to climate-change risks for terrestrial ecosystems has increased in parts of Europe
medium
1
train
5,714
AR6_WGII
1,850
9
Despite an expanding solution space, widespread implementation and monitoring of natural and planned adaptation across Europe is currently limited, due to high management costs, undervaluation of nature, and conservation laws and regulations that do not consider species shifts under future socioeconomic and climatic changes
high
2
train
5,715
AR6_WGII
1,850
11
Limited financial resources prevent widespread implementation of large-scale and connected conservation areas
high
2
train
5,716
AR6_WGII
1,850
13
Risks to terrestrial and freshwater ecosystems are rarely integrated into regional and local land-use planning, land development plans, and agro-system management (medium confidence) (Nila et al., 2019; Heikkinen et al., 2020a).13.3.3 Knowledge Gaps Despite growing evidence of climate-change impacts and risks, including attributed changes to terrestrial ecosystems (Section 13.10.1), this information is geographically not equally distributed, leaving clear gaps for some processes or regions
high
2
train
5,717
AR6_WGII
1,850
14
For processes such as wildfire, the Fire Weather index (Section 13.3.1.3) suggests increasing risk of fires in Europe, but robust projections on incidents and magnitudes of wildfire and their impacts on ecosystems and other sectors is currently limited, particularly for NEU, EEU and WCE
high
2
train
5,718
AR6_WGII
1,850
16
This creates uncertainty about the emergence of extinctions and the magnitudes of impacts for European ecosystems and the services they provide
high
2
train
5,719
AR6_WGII
1,850
20
Furthermore, adaptation actions will depend on local implementation and benefit from being assessed using cultural and Indigenous knowledge where applicable, but this is hardly studied
medium
1
train
5,720
AR6_WGII
1,850
23
Particularly habitat loss in shallow coastal waters and at the coasts themselves, and northward distribution shifts of populations and communities, are evident across all European marine sub-regions
high
2
train
5,721
AR6_WGII
1,850
24
Marine heatwaves have had severe ecological impacts in SEUS
high
2
train
5,722
AR6_WGII
1,850
25
Range contractions, extirpations (medium confidence) (Smale, 2020) and species redistributions have been observed
high
2
train
5,723
AR6_WGII
1,851
1
Reductions in growth and reproductive success of calcifying species are not yet unambiguously detected and attributed in European seas
medium
1
train
5,724
AR6_WGII
1,851
3
Biodiversity changes depend on region, habitat and taxon (medium confidence) (Figure 13.11) overall resulting in the redistribution of biodiversity in Europe (García Molinos et al., 2016), and biodiversity declines in some sub-regions
high
2
train
5,725
AR6_WGII
1,851
4
In TEUS, increased water-column stratification (Section 13.1) and decreasing eutrophication, result in reduced primary production (high confidence) (Figure 13.11; Capuzzo et al., 2018) and productivity at higher trophic levels (high confidence) (Free et al., 2019), while in NEUS sea ice decline has resulted in primary production increase by 40–60%
high
2
train
5,726
AR6_WGII
1,851
5
Climate-related deoxygenation impacts are small in most European waters
medium
1
train
5,727
AR6_WGII
1,851
6
Here warming and eutrophication have altered ecosystem functioning
high
2
train
5,728
AR6_WGII
1,852
3
Since the capacity of natural systems for autonomous adaptation is limited
medium
1
train
5,729
AR6_WGII
1,852
4
At 1.5°C GWL, particularly in winter, Mediterranean coastal fish communities are projected to lose ~10% of species, increasing to ~60% at 4°C GWL (Dahlke et al., 2020), exacerbating regime shifts linked to overexploitation
medium
1
train
5,730
AR6_WGII
1,852
7
Marine primary production is projected to further decrease by 2100 in most European seas between 0.3% at 1.5°C GWL to 2.7% at 4°C GWL
high
2
train
5,731
AR6_WGII
1,852
12
Ocean acidification and its biological and ecological risks are projected to rise in European waters by impeding growth and reproductive success of vulnerable calcifying organisms
medium
1
train
5,732
AR6_WGII
1,852
13
Coralline algae are projected to reduce skeletal performance at 3°C GWL, with negative consequences for habitat formation
medium
1
train
5,733
AR6_WGII
1,852
14
Regionally (Brodie et al., 2014), differences in species-specific vulnerability will result in community shifts from calcifying macroalgae (medium confidence) (Ragazzola et al., 2013) to non-calcifying macroalgae
high
2
train
5,734
AR6_WGII
1,852
16
However, if not supported by sufficient food availability (Thomsen et al., 2013; Clements and Darrow, 2018), such energy reallocation will negatively impact growth or reproduction
medium
1
train
5,735
AR6_WGII
1,852
17
This suggests that acidification risks will be amplified by increased stratification and reduced primary production
medium
1
train
5,736
AR6_WGII
1,852
18
The emergence of harmful algal blooms and pathogens at higher GWLs is unclear across all European seas
low
0
train
5,737
AR6_WGII
1,852
20
Elevated CO2 levels predicted at 4°C GWL will affect the C/N ratio of organic-matter export and, hence, the efficiency of the biological pump
low
0
test
5,738
AR6_WGII
1,852
21
Atlantic herring (Clupea harengus) will benefit with enhanced larval growth and survival from indirect food- web effects (Sswat et al., 2018a), whereas Atlantic cod (Gadus morhua) will face overall negative impacts
medium
1
train
5,739
AR6_WGII
1,852
24
Losses are projected for Posidonia oceanica seagrass habitats in the Mediterranean by up to 75% at 2.5°C GWL
low
0
train
5,740
AR6_WGII
1,852
26
For the Dutch Wadden Sea, the critical rate of 6–10 mm yr–1, at which intertidal flats will start to ‘drown’, will be reached by 2030 at 1.5°C GWL
medium
1
train
5,741
AR6_WGII
1,852
27
European coastal zones provided a total of 494 billion EUR of ecosystem services in 2018, and 4.2–5.1% of this value will be lost due to coastal erosion by 2100 at 2.5°C and 4.6°C GWL, respectively
medium
1
train
5,742
AR6_WGII
1,853
6
These MPAs provide protection from local stressors, such as commercial exploitation, and enhance the resilience of marine and coastal ecosystems, thus lessening the impacts of climate change
medium
1
train
5,743
AR6_WGII
1,853
11
In some partially protected MPAs, local stressors, such as fishing, are higher than adjacent unprotected areas
medium
1
train
5,744
AR6_WGII
1,854
4
Conservation approaches (e.g., MPAs, climate refugia), habitat restoration efforts (Bekkby et al., 2020) and further ecosystem-based management policies do support alleviation of, or adaptation to, climate-change impacts
medium
1
train
5,745
AR6_WGII
1,854
8
While rising sea levels will also directly threaten intertidal and beach ecosystems, coastal wetlands will benefit
medium
1
train
5,746
AR6_WGII
1,854
10
The ‘Blue Growth’ strategy of the European Commission with the aim to increase offshore activities (European Comission, 2012) will increase the pressures on the marine environments
medium
1
train
5,747
AR6_WGII
1,854
12
The introduction of novel hard-substrate intertidal habitats has, and will continue to have, profound ecological ramifications for marine systems, including hydrodynamic changes, stepping stones for non-native species, noise and vibration, and changes in the food web
high
2
train
5,748
AR6_WGII
1,854
22
Observed climate change has led to a northward movement of agro- climatic zones in Europe and earlier onset of the growing season
high
2
train
5,749
AR6_WGII
1,854
23
Warming and precipitation changes since 1990 explain continent-wide reductions in yield of wheat and barley, as well as increases in maize and sugar beet
high
2
train
5,750
AR6_WGII
1,854
25
Drought, excessive rain and the compound hazards of drought and heat (Sections 13.2.1, 13.3.1, 13.10.2) have increased costs and cause economic losses in forest productivity (Schuldt et al., 2020), annual and permanent crops, and livestock farming (Stahl et al., 2016), including losses in wheat production in the EU (van der Velde et al., 2018) and EEU
high
2
train
5,751
AR6_WGII
1,855
1
Regionally, warming caused increases in yields of field-grown fruiting vegetables, decreases in root vegetables, tomatoes and cucumbers (Potopová et al., 2017) and earlier flowering of olive trees
high
2
train
5,752
AR6_WGII
1,855
3
Evidence for growing regional differences of projected climate risks is increasing since AR5
high
2
train
5,753
AR6_WGII
1,855
4
While there is high agreement of the direction of change, the absolute yield losses are uncertain due to differences in model parameterisation and whether adaptation options are represented
high
2
train
5,754
AR6_WGII
1,855
6
Growing regions will shift northward or expand for melons (Bisbis et al., 2019), tomatoes and grapevines reaching NEU and EEU in 2050 under 1.5°C GWL (high confidence) (Hannah et al., 2013; Litskas et al., 2019), while warming would increase yields of onions, Chinese cabbage and French beans (Bisbis et al., 2019)
medium
1
train
5,755
AR6_WGII
1,855
9
Reductions in agricultural yields will be higher in the south at 4°C GWL, with lower losses or gains in the north
high
2
train
5,756
AR6_WGII
1,855
10
The largest impacts of warming are projected for maize in SEU
high
2
train
5,757
AR6_WGII
1,855
11
Use of longer-season varieties can compensate for heat stress on maize in WCE and lead to yield increases for NEU, but not SEU for 4°C GWL
medium
1
train
5,758
AR6_WGII
1,855
14
Warming causes range expansion and alters host pathogen association of pests, diseases and weeds affecting the health of European crops
high
2
train
5,759
AR6_WGII
1,855
21
Climate change also impacts grassland production, fodder composition and quality, particularly in SEU (Dumont et al., 2015) and EEU (Bezuglova et al., 2020), as well as alters the prevalence, distribution and load of pathogens and their vectors
high
2
train
5,760
AR6_WGII
1,855
23
Warming increases the pasture growing season and farming period in NEU and at higher altitudes (Fuhrer et al., 2014), while longer drought periods and thunderstorms can influence abandonment of remote Alpine pastures, reducing cultural and landscape ecosystem services and losing traditional farming practices
high
2
train
5,761
AR6_WGII
1,855
24
At 2–4°C GWL grassland biomass production for forage-fed animals will increase in NEU and the northern Alps, while forage production will decrease in SEU and the southern Alps due to heat and water scarcity (Gauly et al., 2013; Jäger et al., 2020), causing regional reductions of cow milk production in WCE and SEU
high
2
train
5,762
AR6_WGII
1,855
28
Climate change has impacted European marine food production
high
2
train
5,763
AR6_WGII
1,855
31
In the North Sea, cuttlefish (van der Kooij et al., 2016; Oesterwind et al., 2020) and tuna (Bennema, 2018; Faillettaz et al., 2019) have become new target species
medium
1
train
5,764
AR6_WGII
1,856
1
European countries are assessed to be globally among the least vulnerable to the impacts of climate change on fisheries-related food security risks
high
2
train
5,765
AR6_WGII
1,857
2
Assuming MSY management, projections suggest reduced abundance of most commercial fish stocks in European waters of 35% (up to 90% for individual stocks) between 1.5°C and 4.0°C GWL
medium
1
train
5,766
AR6_WGII
1,857
4
Ocean acidification (Section 13.4; Chapter 4) will develop into a major risk for marine food production in Europe under 4°C GWL
high
2
train
5,767
AR6_WGII
1,857
5
Acidification is also projected to negatively affect marine shellfish production and aquaculture in Europe with 4°C GWL (medium confidence) (Fernandes et al., 2017; Narita and Rehdanz, 2017; Mangi et al., 2018).13.5.1.4 Forestry and Forest Products Climate change is altering the structure and function of European forests via changes in temperature, precipitation and atmospheric CO 2, as well as through interaction with pests and fire
high
2
train
5,768
AR6_WGII
1,857
7
While warming and extended growing seasons have positive impacts on forest growth in cold areas in WCE and NEU (Pretzsch et al., 2014; Matskovsky et al., 2020), EEU (Tei et al., 2017) and higher altitude (Sedmáková et al., 2019), drought stress across Europe has been increasing
high
2
train
5,769
AR6_WGII
1,858
2
Water stress exacerbates the incidence from and effects of fire and other natural disturbances (Section 13.3.1), resulting in forest productivity declines or cancelling out productivity gains from CO 2
high
2
train
5,770
AR6_WGII
1,858
10
Extensive droughts during the past two decades have caused many irrigated systems in SEU to cease production (Stahl et al., 2016) indicating limited adaptive capacity to heat and drought
medium
1
train
5,771
AR6_WGII
1,858
14
Changes to cultivars and sowing dates can reduce yield losses (Figure 13.15) but are insufficient to fully ameliorate losses projected >3°C GWL, with an increase of risk from north to south and for crops growing later in the season such as maize and wheat
high
2
train
5,772
AR6_WGII
1,858
15
Adaptations for early maturing reduce yield loss by moving the cycle towards a cooler part of year, and also constrains the increases in irrigation water demands, but reduce the period for photosynthesis and grain filling
high
2
train
5,773
AR6_WGII
1,858
19
These options are used in indoors- reared species (Gauly et al., 2013) but are limited in mountain pastures
high
2
train
5,774
AR6_WGII
1,858
21
Dairy systems that maximise the use of grazed pasture are considered more environmentally sustainable but are not fully supported by policy and markets
medium
1
train
5,775
AR6_WGII
1,858
26
Agroforestry, integrating trees with crops (silvoarable), livestock (silvopasture), or both (agrosilvopasture), can enhance resilience to climate change (Chapter 5), but implementation in Europe needs improved training programmes and policy support
high
2
train
5,776
AR6_WGII
1,858
28
Agricultural policy, market prices, new technology and socioeconomic factors play a more impor - tant role in short-term farm-level investment decisions than climate- change impacts
high
2
train
5,777
AR6_WGII
1,860
7
Inflexible and non-adaptive allocation schemes can result in conflicts among European countries
medium
1
train
5,778
AR6_WGII
1,860
8
The development of adaptation strategies for seafood production since the Paris Agreement is insufficient in Europe
high
2
train
5,779
AR6_WGII
1,860
13
Successful adaptation strategies include altering the tree species composition to enhance the resilience of European forests
high
2
train
5,780
AR6_WGII
1,860
14
Greater diversity of tree species reduces vulnerability to pests and pathogens (Felton et al., 2016), and increases resistance to natural disturbances
high
2
train
5,781
AR6_WGII
1,860
15
Depending on forest successional history (Sheil and Bongers, 2020), tree composition change can increase carbon sequestration
high
2
train
5,782
AR6_WGII
1,860
16
Conservation areas can also help climate-change adaptation by keeping the forest cover intact, creating favourable microclimates and protecting biodiversity
low
0
train
5,783
AR6_WGII
1,860
17
Reforestation reduces warming rates (Zellweger et al., 2020) and extremely warm days (Sonntag et al., 2016) inside forests, reducing natural disturbances and fires
high
2
train
5,784
AR6_WGII
1,860
20
Consumer demand for food and timber products can adapt to productivity changes and be mediated by price (e.g., in response to production changes or policies on food-related taxation), reflect changes in preferences (e.g., towards plant-based foods motivated by environmental, ethical or health concerns) or reductions in food waste
high
2
train
5,785
AR6_WGII
1,860
21
Although mitigation potentials of dietary changes have received increasing attention, evidence is lacking on potential for adaptation through changes in European food consumption and trade, despite these socioeconomic factors being a strong driver for change
medium
1
train
5,786
AR6_WGII
1,860
25
Effectiveness of adaptation options is predominantly qualitatively mentioned but not assessed, and the effectiveness of combinations of measures is rarely assessed
high
2
train
5,787
AR6_WGII
1,861
2
The assessment of irrigation needs and the impact of CO 2 and O 3 tend to focus on individual species and processes hindering upscaling to multiple stressors and mixed production
high
2
train
5,788
AR6_WGII
1,862
1
Risks of rutting and blow-ups of roads (particularly in low altitudes) due to high summer temperatures are expected to increase in WCE and EEU at 3°C GWL
medium
1
train
5,789
AR6_WGII
1,863
3
Current damages are mainly related to river floods and storms, but heat and drought will become major drivers in the future
medium
1
train
5,790
AR6_WGII
1,863
6
Indirect effects via supply chains, transport and electricity networks can be as high as, or substantially higher than, direct effects
medium
1
train
5,791
AR6_WGII
1,863
9
Due to reduced snow availability and hotter summers, damages are projected for the European tourism industry, with larger losses in SEU (high confidence) and some smaller gains in the rest of Europe
medium
1
train
5,792
AR6_WGII
1,871
3
A GWL of 1.5°C could result in 30,000 annual deaths due to extreme heat, with up to threefold the number under 3°C GWL
high
2
train
5,793
AR6_WGII
1,871
5
Heat stress risks will be lower under SSP1 than the SSP3 or SSP4 scenarios
high
2
train
5,794
AR6_WGII
1,871
11
In large European cities, stabilising climate warming at 1.5°C GWL would decrease premature deaths by 15–22% in summer compared with stabilisation at 2°C GWL
high
2
train
5,795
AR6_WGII
1,871
20
Climate change could increase air pollution health effects, with the size of the effect differing across European regions and pollutants
medium
1
train
5,796
AR6_WGII
1,871
23
At 2.5°C GWL, mortalities due to exposure to PM2.5 are projected to increase by up to 73% in Europe
medium
1
train
5,797
AR6_WGII
1,871
24
At 2°C GWL, annual premature mortalities due to exposure to near-surface ozone are projected to increase up to 11% in WCE and SEU and to decrease up to 9% in NEU (under RCP4.5)
medium
1
train
5,798
AR6_WGII
1,873
15
There has been a temperature-dependent range expansion of ticks that is projected to expand further north in Sweden, Norway and the Russian Arctic (Jaenson et al., 2012; Jore et al., 2014; Tokarevich et al., 2017; Waits et al., 2018), and to higher elevations in Austria and the Czech Republic
medium
1
test
5,799
AR6_WGII
1,873
20
Projections for Europe show the West Nile virus risk to expand: by 2025, the risk is projected to increase in SEU and southern and eastern parts of WCE
medium
1
train