Conservation Opportunities Arise From the Co-Occurrence of Surfing and Key Biodiversity Areas

Conserving biodiversity and ecosystem services requires diverse models that empower communities to steward and benefit from resources. Here we investigate the potential of surfing resources, a new conservation asset class, and the surfing community, an underutilized conservation constituency, to conserve marine biodiversity. We conducted a spatial analysis of the overlap among Key Biodiversity Areas, Marine Protected Areas (MPAs), and 3,755 surf breaks globally. We find that 62.77% of surf breaks are not within MPAs and that 25.81% of all surf breaks are within 5 km of a Key Biodiversity Area, but are not within a MPA, suggesting that strategic conservation opportunities arise from the co-occurrence of surfing resources and biodiversity priorities. Establishing or extending protections to surfing ecosystems could increase protection for biodiversity at one-quarter of surf breaks. Sustainable management of these resources ensures their ability to provide for the character, economy, and development of coastal communities worldwide.


INTRODUCTION
Ocean ecosystems provide critical social, economic, and cultural life support systems for communities globally, yet are subject to an increasingly intense onslaught of anthropogenic threats that diminish these benefits. In response, governments, communities, and organizations have employed a range of approaches to better protect species, habitats, and ecosystem functions to mitigate human threats. Global targets have been established to drive governments toward agreedupon conservation goals, in order to protect a minimum percent of ecologically critical land and seascapes necessary to sustain global biodiversity and the services it provides to humanity (Hannah et al., 2020). Reaching global targets requires massive global investment to increase coverage of Marine Protected Areas (MPAs) and improve their implementation.
Despite this significant value, surf breaks-and their surrounding ecosystems ("surfing resources"; Atkin et al., 2019) that shape them-are subject to diverse threats. These include physical impacts from global climate change and sea level rise (Hemer et al., 2013;Reineman et al., 2017), coastal modification and development (Corne, 2009;Scarfe et al., 2009), and coral reef decline (important ecosystems for surf breaks in the tropics; Hoegh-Guldberg et al., 2017). Additional factors limit people's ability to benefit from surfing resources, including coastal access disruption Reineman and Ardoin, 2018), insults to coastal water quality and associated health outcomes (Grant et al., 2001;Fewtrell and Kay, 2015), and sociocultural factors such as crowding and territoriality (Bandeira, 2014;Mixon, 2014;Usher and Kerstetter, 2015;Towner, 2016;Usher and Gómez, 2016). Recognition of these threats has increased in recent decades and responses have emerged at various scales, from formal institutional recognition of surfing resource management necessity at national scales (e.g., in New Zealand, Australia, and Peru), to civil society organizations proliferating and leading efforts at local to regional scales [e.g., efforts by Save The Waves Coalition (STW)], to site-specific efforts (e.g., listing of Surfrider Beach in Malibu, CA, United States on the United States National Register of Historic Places).
Surf conservation, the resources it seeks to sustain, and the wider ecosystems in which surfing resources are embedded have received less attention in the conservation movement relative to other cultural resources (e.g., shipwrecks) or biological resources that have long been the focus for marine conservation efforts (see, e.g., U.N. Sustainable Development Goal 14: Conserve and sustainably use the oceans, seas and marine resources for sustainable development). This is changing as communities, researchers, and practitioners increase understanding and visibility of the value of surf breaks for local and, particularly, developing economies (McGregor and Wills, 2016). At the Uluwatu surf area in Bali, Indonesia, for example-a priority region for coral reef and marine mammal conservation-a survey of surf tourists' expenditures estimated the total actual annual expenditure to be $35.3 M USD per year. This major socioeconomic benefit was previously underrecognized and therefore not available for consideration in planning processes for coastal developments that would have affected wave quality and, by extension, surf ecotourism (Margules et al., 2014). Globally, surf tourism is valued at $31.5 to $64.9 B USD with participants willing to pay more for sustainable surf tourism opportunities (Mach and Ponting, 2021). Such benefits provide the mechanism to accelerate economic growth in communities surrounding surf breaks-an effect magnified in emerging economies (McGregor and Wills, 2016).
The co-location of surfing resources with other priority conservation targets thus represents a significant conservation opportunity. Here, we assess the conservation opportunities arising from the co-occurrence of surfing and biodiversity priority areas globally. Based on our analysis, we explore the potential impacts of joint conservation and sustainable development initiatives that will protect biodiversity and the important values and benefits that surfing resources provide to communities.

MATERIALS AND METHODS
We compiled and analyzed global databases of (1) surf break locations, (2) designated protected areas, (3) biodiversity conservation priority areas, and (4) national jurisdictional boundaries using ArcGIS for Desktop software [Environmental Systems Research Institute, Inc. (Esri), Redlands, CA United States]. The attributes of each dataset, including qualifications on data quality and technical information pertaining to data processing are included in the Supplemental Online Materials. We briefly summarize the data used here: (1) Surf breaks: We draw on a proprietary dataset of surf break locations provided by Surfline/Wavetrak, Inc. (Huntington Beach, CA United States; "Surfline"), generally considered to set the industry standard. After excluding artificial (i.e., human-made) and freshwater (e.g., lake-based) surf breaks, this dataset contains 3,755 individual surf break locations. The "Union of the Esri Country shapefile and the Exclusive Economic Zones (version 2)" was updated using their Exclusive Economic Zones v10 dataset.
These data were prepared, integrated, and analyzed in ArcMap to identify intersections of points and areas. Geodesic buffers (1 and 5 km) were drawn around each surf break because, while each surf break is designated in the dataset with a single, one-dimensional point, actual surf breaks extend over tens to hundreds of meters or more (Butt et al., 2004). The 5 km buffer areas are inclusive of intersections lying within the 1 km buffer areas.

RESULTS
Surf breaks are globally distributed (3,755 distinct surf breaks among 93 countries); representation by country varies in the dataset, with 50 countries containing 10 or more surf breaks accounting for 94.57% of surf breaks and 6 countries accounting for 59.15% of the global total. Many surf breaks are already situated within-and more are situated near-existing protected areas, but roughly three-fifths of all surf breaks (62.77%) are not within protected areas. When a surf break's point-location is expanded to include the surrounding area (i.e., its surfing ecosystem: Arroyo et al., 2019), the proportions are much higher: 60.67% lie within 1 km and 80.77% lie within 5 km of existing protected areas. Likewise, the overall proportion of surf breaks situated within KBAs is 14.81%, but increases as the buffer area is expanded: 30.95% of surf breaks lie within 1 km of a KBA and 46.44% lie within 5 km see Table 1.
The potential permutations of surf breaks lying in/out of protected area versus in/near/out of a KBA, suggests a 2 × 2 matrix and yields a typology with four types of surf break: those not within a KBA and not within a protected area (Type I; 56.56%); those within a KBA and within a protected area (Type II; 8.60%); those not within a KBA but within a protected area (Type III; 28.63%); and those within a KBA but not within a protected area (Type IV; 6.21%). Table 2 displays this matrix. Using buffer areas to incorporate the surfing ecosystem has strong implications for the resulting permutations by changing the likelihood of intercept with a key biodiversity area, as shown within each cell of the Table 2 matrix on the 1 and 5 km data lines. For example, of Type IV surf breaks: 6.21% are in a KBA, 15.45% are within 1 km of a KBA, and 25.81% are within 5 km of a KBA. Figure 1 displays the locations of surf breaks worldwide and highlights the Type IV breaks. Table 2 additionally displays the number of countries in which greater than 50% of surf breaks match each type (see parenthetical numbers within matrix cells).

DISCUSSION
Surf breaks-and their surrounding areas and ecosystems that comprise the surfing resource (Atkin et al., 2019)-represent a new asset class in conservation, constituting a valuable physical and sociocultural resource that is globally distributed. These   This 2 × 2 matrix displays summary data on the number of surf breaks and countries matching the criteria for each Type, depending whether an individual surf break is located out of or else within 0, 1, or 5 km of a Protected Area or Key Biodiversity Area. Each cell contains, for each intercept radius, the (global) total count of Type, the Type's proportion of global total, and, in parentheses, the count of countries in which greater than 50% of surf breaks match the Type.
resources are critically important to a large constituency of ocean users-surfers-and an associated, growing industry. There are over 34 million surfers worldwide, while the surf industry is valued at over 11 billion USD. Ecotourism is growing at 44% globally (compared to mass tourism at 4%) and ecotourists are willing to pay up to 25% more for experiences that directly benefit communities. Surfers are intimately knowledgeable about coastal environments and deeply connected with coastal places; displacement of this constituency through loss of surf breaks has negative consequences (Reineman, 2016;Reineman and Ardoin, 2018). In contrast, proactive management and careful protection of surfing resources could protect and sustain their significant economic and development benefits (Lazarow et al., 2008;McGregor and Wills, 2016). Our findings show that nearly two-thirds (62.77%) of surf breaks are not currently located within protected areas (Table 1), presenting an opportunity to FIGURE 1 | Global distribution of surf breaks illustrating co-beneficial conservation opportunities, where protection of currently unprotected marine areas could benefit surfing resources and biodiversity. Further analysis of the spatial occurrence of surfing resources, biodiversity areas, and protected areas yields a typology of four Types of surf breaks: (I) not within either a KBA or protected area, (II) within both a KBA and a protected area, (III) not within a KBA but within a protected area, and (IV) within a KBA but not within a protected area. The global map highlights Type IV. Inset maps illustrate four example countries whose surf breaks currently comprise a majority of each type: (A) Costa Rica (Type I), (B) Portugal (Type II), (C) Fiji (Type III), and (D) New Zealand (Type IV). Any surf break's current type could change based on a modification of its country's protected area regime or subsequent change in biodiversity status (or wholesale loss of the surf break itself).
expand conservation programs to protect these resources and associated ecosystems. Indeed, protection of surfing resources is likely best achieved through full consideration of their surrounding systems since the value of the surf break itself is predicated on a suite of important and interacting factors, both physical and biological, which combine to shape the quality of a surf break (Arroyo et al., 2019;Atkin et al., 2019). These factors rely on phenomena and processes whose spatial scales certainly extend beyond the nonspatial "point" locations used in our analyses to represent surf break location and, in some cases, beyond the 5 km buffer area we use (Butt et al., 2004). The surfing experience is impacted by pressures that also threaten biodiversity, including pollution and water quality, destruction or modification of habitat, and rising sea levels. These threats likewise operate at scales beyond the point location of a surf break. A proportion, 6.21% of surf breaks not currently within protected areas are within KBAs; this percentage climbs to 25.81% when the surf break's surrounding area is expanded by a 5 km radius (Type IV; Table 2). In other words, many surf breaks are adjacent to or within the vicinity of KBAs.
This co-occurrence presents opportunities for co-benefits to both biodiversity conservation and the sustainable development potential of surfing resource protection. In the roughly 20% of surf breaks located within a protected area and also within 5 km of a KBA (Type II; Table 2), the existing protections may not necessarily extend to conserve surfing resources (i.e., the restrictions within a given protected area may focus specifically on non-surfing-related resources, such as fishery "no take" areas). Therefore, even with protected areas in place, some related socioeconomic and cultural values of surfing resources are probably not protected. Extending protections to surfing resources in these existing protected areas could have additional ecosystem and biodiversity co-benefits, including advancing global marine conservation priorities (e.g., IUCN's World Conservation Congress 2016 Resolution 50 for 30% global marine protected area coverage by 2030).
The geographic scale and distribution of protection for surfing resources, like many marine conservation targets, is itself unevenly distributed. This is reflected in our analyses, which show "scale" differences: as surf breaks are expanded to include the surrounding areas important for surfing resources, the conservation co-benefit potential increases as the surfing area protected increases (Type II and Type IV;  Table 2). "Distributional differences" are highlighted by the disproportional allocations of surf breaks among countries globally ( Table 1). Surf breaks are not evenly distributed: countries with more coastline have more potential locations for surf breaks, however, there is also bias in the surf break dataset (see explanation in SOM). Still, our analyses suggest that individual countries have widely varying potential for biodiversity co-benefits from surf break conservation. This is illustrated by the examples of Costa Rica, Portugal, Fiji, and New Zealand (see Figure 1 insets).
Costa Rica has a high proportion of Type I surf breaks located outside of both protected areas and KBAs (Figure 1A). This reflects a pattern in many countries, where an underinvestment in MPAs has left a majority of nearshore areas unprotected, including in areas where there are substantial surf resources. In countries like Costa Rica, there is a high potential to protect coastal areas where surf breaks are an important resource. Though this potential does not include designated biodiversity areas in Costa Rica, ecosystem protections could expand to include conservation measures for coastal fisheries. Given the national significance of coastal, and specifically surf-related tourism in Costa Rica (Tantamjarik, 2004), creation and extension of protected areas to include surfing resources would be of substantial benefit to ensuring biodiversity and the sustainable tourism and development opportunities for surf breaks.
Portugal has a high proportion of Type II surf breaks located within both protected areas and KBAs (Figure 1B). There is potential to revisit protected area designations there to determine whether they extend to recreational resources generally and to surfing resources specifically. In countries like Portugal, MPAs generally focus on fisheries such that "recreational resources" regulated within MPAs are extractive in nature. 4 There is recognition of surfing's significance in Portugal where, among other things, a World Surfing Reserve has been designated at Ericeira by the STW. 5 This NGO-provided designation does not compel any enforceable governance measures within the reserve, but does provide surfing conservation advocates a powerful advocacy tool there and elsewhere within Portugal's well-developed MPA system.
Fiji has a high proportion of Type III surf breaks located within a protected area but not within a KBA ( Figure 1C). Expansion of protected area restrictions to include the suite of resources and threat reduction measures that support surf break quality would have benefits for both surfing resources and their surrounding ecosystems. In Fiji, these are generally coral reefs, which are significant for both inshore fisheries and nonsurfing ecotourism, like SCUBA diving (Teh et al., 2009). While there are not immediate benefits to a designated KBA, including surfing resources within Fiji's existing protected areas could yield additional ecosystem benefits.
New Zealand has a high proportion of Type IV surf breaks located within a KBA but not within a protected area ( Figure 1D)-and illustrates several caveats with our analyses and spatial protections for surfing resources more generally. Despite the lack of protected areas encompassing surf breaks in New Zealand, protections for surf breaks do exist via the national Coastal Policy Statement of 2010, which identifies 17 Surf Breaks of National Significance 6 and stipulates that impacts to these breaks be avoided. Recently published guidance provides New Zealand managers, surfers, and other stakeholders with clear processes for considering and avoiding impacts to that nation's surf breaks (Atkin et al., 2019). While these protections include some aspects of marine ecosystems, such as their physical structure, they do not necessarily, explicitly ensure protection of biodiversity as compared to comprehensive protected areas.
As these countries illustrate, while protected areas targeting biodiversity and ecosystems proliferate globally, there are very few examples of protected areas explicitly designed for surf break conservation, despite their value as natural, recreational, and cultural endowments. By contrast, sitebased protections for other non-extractive marine activities are common (e.g., shipwrecks, SCUBA, or ecotourism sites). Additionally, terrestrial systems host many examples of naturebased conservation designations for recreational values (e.g., National Parks, as established by countries worldwide). These countries also illustrate a key limitation of these analyses, which, as a global-level review, do not delve into the variety and complexity of marine resource management strategies on a country-by-country basis. This is likewise underscored by the challenge of identifying tractable, comprehensive, globalscale datasets of MPAs, biodiversity, and surfing resources. Our analyses are thus constrained by the limitations of these datasets that, while analytically tractable and global in scale, each have benefits and drawbacks in terms of the data included or excluded. For example, the WDPA includes areas with widely varying levels of protection-these may or may not be relevant to surfing resources depending on their specific nature and scale. However, as a brief report of a novel, global analysis, we acknowledge these limitations and encourage other researchers to tackle the fine-resolution, country-scale and smaller, analyses of more comprehensive local datasets.
As the world's marine ecosystems continue to be threatened by overfishing, pollution, poorly planned development, and changing climate, global conservation efforts will benefit from diverse participants and strategies. Considerations for surfing resource management are the subject of increasing attention, from human-impact indicator development (Arroyo et al., 2020) to practical applications of various site-management techniques (Blum and Orbach, 2021): these studies underscore local, site-specific complexities in planning and implementation. Combining surfing resource conservation with biodiversity conservation can potentially protect millions of hectares of habitat that might otherwise be overlooked. There are examples where this has occurred indirectly (as when surf breaks lie within MPAs targeting other resources) or by other means (such as non-governmental designations of surf reserves), but a systematic approach to identify and act upon opportunities to achieve co-beneficial impacts to surfing and biodiversity resources can yield more positive impacts. These could accrue to local communities and the surf ecotourism sector, but only if the underlying resources-surf breaks-are sustainably managed. Continued identification, prioritization, and protection surf breaks is thus an opportunity to both ensure sustainable management and, as we show, to realize an as-yet-untapped avenue for biodiversity conservation. We encourage further research into these opportunities-especially careful, local-to-regional analyses parsing unique, site-specific characteristics of surfing resources, biodiversity conservation needs, and protected area status and which could guide targeted conservation efforts.

DATA AVAILABILITY STATEMENT
The original contributions presented in the study are included in the article/Supplementary Material, further inquiries can be directed to the corresponding author/s.

AUTHOR CONTRIBUTIONS
DR led preparation of manuscript and supervision of analyses. JK and NS-C brainstormed initial project, contributed to writing, and assisted with supervision of analyses. KK conducted analyses and contributed to writing. All authors contributed to the article and approved the submitted version.