Native California Research Articles

Ontological Beliefs and Hunter–Gatherer Ritual Landscapes: Native Californian Examples

Landscapes are socially produced and reproduced spaces. This is easily recognizable for large-scale urban groups with built environments that dominate living places. But it also pertains to all types of societies and cultures, even small-scale hunter–gatherers, once the ontological beliefs structuring landscape perception and use are acknowledged. The foragers of south–central and southern California and the Great Basin illustrate this fact. They maintained a widely shared ontological perspective supported by a fundamental cognitive postulate. This is that supernatural power, the principle causative agent in the universe, was differentially distributed among individuals and places. The distribution of power, revealed by certain geomorphological features and natural events, structured their perceptions of landscape. These perceptions were expressed in ritual and symbolism, including petroglyphs and pictographs as durable manifestations of ceremonies on the landscape. The ontological relationship between power and landscape explains a longstanding question in hunter–gatherer archaeology: Why were rock writing sites created at specific locations? It also explains another equally significant but rarely considered and related problem: Why do some localities have massive quantities of rock writings that dwarf most other sites? The landscape symbolism of and the placement of sites by Native Californian and Great Basin tribes is explained by reference to their shared ontological beliefs, illustrating how they structured their ritual practices and archaeological record.

Atmospheric drying and soil drying: Differential effects on grass community composition

AbstractGlobal surface temperatures are projected to increase in the future; this will modify regional precipitation regimes and increase global atmospheric drying. Despite many drought studies examining the consequences of reduced precipitation, there are few experimental studies exploring plant responses to atmospheric drying via relative humidity and vapor pressure deficit (VPD). We examined eight native California perennial grass species grown in pots in a greenhouse in Los Angeles, California for 34 weeks. All pots were well‐watered for 21 weeks, at which point we reduced watering to zero and recorded daily growth and dormancy for 3 weeks. We used this information to better understand the drought tolerance of our species in a larger soil drying × atmospheric drying experiment. In this larger experiment, we grew all eight species together in outdoor mesocosms and measured changes in community composition after 4 years of growth. Soil drying in our small pot experiment mirrored compositional shifts in the larger experiment. Namely, our most drought‐tolerant species in our pot experiment was Poa secunda, due to a summer dormancy strategy. Similarly, the grass community shifted toward P. secunda in the driest soils as P. secunda was mostly unaffected by either soil drying or atmospheric drying. We found that some species responded strongly to soil drying (Elymus glaucus, Festuca idahoensis, and Hordeum b. californicum), while others responded strongly to atmospheric drying (Bromus carinatus and Stipa cernua). As result, community composition shifted in different and interacting ways in response to soil drying, atmospheric drying, and their combination. Further study of community responses to increasing atmospheric aridity is an essential next step to predicting the future consequences of climate change.

Assessing hybrid vigour using the thermal sensitivity of physiological trade‐offs in tiger salamanders

Abstract Hybridization between species affects biodiversity and population sustainability in numerous ways, many of which depend on the fitness of the hybrid relative to the parental species. Hybrids can exhibit fitter phenotypes compared to the parental lineages, and this ‘hybrid vigour’ can then lead to the extinction of one or both parental lines. In this study, we analysed the relationship between water loss and gas exchange to compare physiological performance among three tiger salamander genotypes—the native California tiger salamander (CTS), the invasive barred tiger salamanders (BTS) and CTS × BTS hybrids across multiple temperatures (13.5°C, 20.5°C and 23.5°C). We developed a new index of performance, the water‐gas exchange ratio (WGER), which we define as the ratio of gas exchange to evaporative water loss (μL VO2/μL H2O). The ratio describes the ability of an organism to support energetically costly activities with high levels of gas exchange while simultaneously limiting water loss to lower desiccation risk. We used flow through respirometry to measure the thermal sensitivity of metabolic rate and resistance to water loss of each salamander genotype to compare indices of physiological performance. We found that temperature had a significant effect on metabolic rate and resistance to water loss, with both traits increasing as temperatures warmed. Across genotypes, we found that hybrids have a higher WGER than the native CTS, owing to a higher metabolic rate despite having a lower resistance to water loss. These results provide a greater insight into the physiological mechanisms driving hybrid vigour and offer a potential explanation for the rapid spread of salamander hybrids. More broadly, our introduction of the WGER may allow for species‐ or lineage‐wide comparisons of physiological performance across changing environmental conditions, highlighting the insight that can be gleaned from multitrait analysis of organism performance. Read the free Plain Language Summary for this article on the Journal blog.

Native amphibian toxin reduces invasive crayfish feeding with potential benefits to stream biodiversity

BackgroundBiodiversity is generally reduced when non-native species invade an ecosystem. Invasive crayfish, Procambarus clarkii, populate California freshwater streams, and in the Santa Monica Mountains (Los Angeles, USA), their introduction has led to trophic cascades due to omnivorous feeding behavior and a rapid rate of population growth. The native California newt, Taricha torosa, possesses a neurotoxin, tetrodotoxin (TTX), that affects freshwater animal behavior. Given P. clarkii has a limited evolutionary history with TTX, we hypothesized that TTX may affect crayfish feeding behaviors. To determine if TTX affects P. clarkii behavior, we measured cumulative movement and various feeding behaviors of P. clarkii exposed to (i) waterborne, ecologically realistic concentrations of TTX (~ 3.0 × 10− 8 moles/L), (ii) an anuran chemical cue to account for intraguild cues, or (iii) a T. torosa chemical cue with quantitated TTX in it (~ 6.2 × 10− 8 moles/L).ResultsWe found that the presence of TTX in any form significantly reduced crayfish movement and decreased the amount of food consumed over time. Crayfish responses to the anuran treatment did not significantly differ from controls.ConclusionOur laboratory results show that naturally occurring neurotoxin from native California newts limits invasive crayfish foraging and feeding rates, which may play a role in preserving local stream ecosystems by limiting invasive crayfish behaviors that are detrimental to biodiversity.

Effects of intraspecific variation in a native species' phenology on its coexistence with non‐native plants

Intraspecific trait variation is ubiquitous and is likely to influence species coexistence. Despite theoretical progress, empirical work on the effects of intraspecific variation on the dynamics of competing species is rare. This is because of the formidable empirical requirements necessary to link intraspecific variation in species' functional traits with intraspecific variation in the demographic and competitive rates that mediate coexistence. Here we partially overcome these challenges to determine how intraspecific variation in reproductive phenology in a native Californian annual plant species Lasthenia californica affects its ability to coexist with two non‐native species Bromus madritensis and Lactuca serriola that display contrasting phenological patterns. Using data from a field experiment, we empirically parameterize a model of competitive population dynamics, accounting for the effects of intraspecific phenological trait variation on the native species' response to both intra‐ and interspecific competition. We find that intraspecific variation in phenology drives differences in the native species' response to competition. Moreover, simulations of the parameterized model show that this variation improves the competitive performance of the native species. This occurs because of the effects of nonlinear averaging mediated by a nonlinear, concave‐up competition function that is a general feature of competition across a wide range of taxa. While intraspecific variation improves competitive performance, we also find that the magnitude of the benefit is predicted to be insufficient to prevent competitive exclusion against the non‐native species with early phenogy Bromus. Against the second non‐native species with later phenology Lactuca, intraspecific variation is predicted to result in coexistence where competitive exclusion would otherwise occur, but we could not rule out alternative qualitative outcomes for this interaction.

Estimating population size for California spotted owls and barred owls across the Sierra Nevada ecosystem with bioacoustics

Monitoring population size at ecosystem scales is difficult for most species of conservation concern. While assessing site occupancy at broad scales has proven feasible, rigorous tracking of changes in population size over time has not – even though it can provide a stronger basis for assessing population status and conservation-decision making. Therefore, we demonstrate how relatively low-intensity, ecosystem-scale passive acoustic monitoring (PAM) can be linked to local-density monitoring to estimate the population size of native California spotted owls (Strix occidentalis occidentalis) and invasive barred owls (S. varia) across the western Sierra Nevada, California. Based on a PAM sampling grid with 400 ha cells (the approximate home range size of these species), we estimated site occupancy to be between 0.42 (SE = 0.02) and 0.30 (SE = 0.02) for California spotted owls using relatively liberal and strict criteria, respectively, for considering a cell occupied. PAM-based site occupancy estimates within local-scale density monitoring study areas (range = 0.41–0.78 and 0.28–0.76 for liberal and strict criteria, respectively) were strongly and positively correlated with local density (range = 0.08–0.31 owl/km2) for this species. In contrast, ecosystem-wide site occupancy of barred owls was very low based on PAM (0.034, SE < 0.01), as were densities within local monitoring studies (range = 0–0.005 owls/km2). By scaling ecosystem-wide site occupancy estimates to densities estimated with local monitoring studies, we estimated that, depending on occupancy criteria, 2,218 (SE = 278) or 2,328 (SE = 489) California spotted owls occurred in the Sierra Nevada ecosystem in 2021. Thus, while California spotted owls are a rare subspecies, they were well-distributed across the Sierra Nevada. Because there were so few barred owl detections, we could not estimate ecosystem-scale abundance, which reflects the success of prior experimental removals in the region. In conclusion, our study provides a generalizable framework for estimating population size for territorial species with PAM at ecosystem scales when local-scale estimates of density are available. Thus, we demonstrate that this approach can provide novel and valuable insights into monitoring populations to aid species conservation.

Comparing levels of geitonogamous visitation by honey bees and other pollinators

Geitonogamy, the transfer of pollen from one flower to another on the same plant, is often the primary means of self-pollination in flowering plants. For self-compatible plants, self-fertilization may lead to greatly reduced offspring fitness via inbreeding depression. For self-incompatible plants, geitonogamous pollen transfer can result in low seed set, even when stigmatic pollen loads are substantial. For multiple self-compatible, native California plants, we found that honey bees visited more flowers per plant than native insects, and that offspring resulting from pollination by honey bees had reduced fitness relative to those resulting from native insect pollination. Here we investigate whether honey bees generally make more geitonogamous visits than other pollinators using data from a global survey of 41 manuscripts that reported floral visitation data. Compared to the average of all non-honey bee visitors in a plants pollinator assemblage, honey bees visit significantly more flowers per plant, though they do not differ from the non-honey bee visitor with the highest rate of geitonogamous visitation. However, the disparity between rates of geitonogamous visitation by honey bees and non-honey bee visitors is a function of the frequency of honey bees relative to non-honey bee visitors. As honey bees become increasingly numerically dominant, there is a trend for their rates of geitonogamous visitation to increase, accompanied by a significant decline in flowers visited per plant by non-honey bee visitors. While we found that honey bees visited more flowers per plant compared to the average of other visitors, large or eusocial pollinators were as likely as honey bees to be the most geitonogamous visitor.

When the neighborhood matters: contextual selection on seedling traits in native and non-native California grasses.

Plants interact extensively with their neighbors, but the evolutionary consequences of variation in neighbor identity are not well understood. Seedling traits are likely to experience selection that depends on the identity of neighbors because they influence competitive outcomes. To explore this, we evaluated selection on seed mass and emergence time in two California grasses, the native perennial Stipa pulchra and the non-native annual Bromus diandrus, in the field with six other native and non-native neighbor grasses in single and mixed species treatments. We also quantified characteristics of each neighbor treatment to further investigate factors influencing their effects on fitness and phenotypic selection. Selection favored larger seeds in both focal species and this was largely independent of neighbor identity. Selection generally favored earlier emergence in both focal species, but neighbor identity influenced the strength and direction of selection on emergence time in S. pulchra but not B. diandrus. Greater light interception, higher soil moisture, and greater productivity of neighbors was associated with more intense selection for earlier emergence and larger seeds. Our findings suggest that changes in plant community composition can alter patterns of selection in seedling traits, and that these effects can be associated with measurable characteristics of the community.

Bioclimatic Characterisation of Specific Native Californian Pinales and Their Future Suitability under Climate Change.

Rising temperatures and changes in precipitation patterns under climate change scenarios are accelerating the depletion of soil moisture and increasing the risk of drought, disrupting the conditions that many plant species need to survive. This study aims to establish the bioclimatic characterisation, both qualitative and quantitative, of ten native Californian Pinales for the period 1980-2019, and to determine their habitat suitability by 2050. To achieve this, an exhaustive search of the Gbif database for records of ten conifer taxa was carried out. To conduct the bioclimatic characterisation of the studied taxa, we worked with the monthly values of average temperature and precipitation for the period 1980-2019 from 177 meteorological stations. Linear regressions was performed in order to compile the future evolution of California's climate. Suitable areas and optimal areas were defined at the present time (1980-2019) and its future projection (2050). We applied Boolean logic and, in this investigation, the Conditional Logic Operator (CON) was used to determine the possible species presence (one) or absence (zero) for each of the 15 variables analysed. In general, most of the conifers studied here will experience a reduction in their habitat range in California by the year 2050 due to climate change, as well as the displacement of species towards optimal areas. Furthermore, the results have highlighted the applicability of bioclimatology to future conditions under climate change. This will aid conservation managers in implementing strategic measures to ameliorate the detrimental impacts of climate change, thereby ensuring the ecological integrity and sustainability of the affected conifer species.

Rapid evolution during climate change: demographic and genetic constraints on adaptation to severe drought.

Populations often vary in their evolutionary responses to a shared environmental perturbation. A key hurdle in building more predictive models of rapid evolution is understanding this variation-why do some populations and traits evolve while others do not? We combined long-term demographic and environmental data, estimates of quantitative genetic variance components, a resurrection experiment and individual-based evolutionary simulations to gain mechanistic insights into contrasting evolutionary responses to a severe multi-year drought. We examined five traits in two populations of a native California plant, Clarkia xantiana, at three time points over 7 years. Earlier flowering phenology evolved in only one of the two populations, though both populations experienced similar drought severity and demographic declines and were estimated to have considerable additive genetic variance for flowering phenology. Pairing demographic and experimental data with evolutionary simulations suggested that while seed banks in both populations probably constrained evolutionary responses, a stronger seed bank in the non-evolving population resulted in evolutionary stasis. Gene flow through time via germ banks may be an important, underappreciated control on rapid evolution in response to extreme environmental perturbations.

Widespread gene flow following range expansion in Anna's Hummingbird.

Anthropogenic changes have altered the historical distributions of many North American taxa. As environments shift, ecological and evolutionary processes can combine in complex ways to either stimulate or inhibit range expansion. Here, we examined the role of evolution in a rapid range expansion whose ecological context has been well-documented, Anna's Hummingbird (Calypte anna). Previous studies have suggested that the C. anna range expansion is the result of an ecological release facilitated by human-mediated environmental changes, where access to new food sources have allowed further filling of the abiotic niche. We examined the role of gene flow and adaptation during range expansion from their native California breeding range, north into Canada and east into New Mexico and Texas, USA. Using low coverage whole genome sequencing we found high genetic diversity, low divergence, and little evidence of selection on the northern and eastern expansion fronts. Additionally, there are no clear barriers to gene flow across the native and expanded range. The lack of selective signals between core and expanded ranges could reflect (i) an absence of novel selection pressure in the expanded range (supporting the ecological release hypothesis), (ii) swamping of adaptive variation due to high gene flow, or (iii) limitations of genome scans for detecting small shifts in allele frequencies across many loci. Nevertheless, our results provide an example where strong selection is not apparent during a rapid, contemporary range shift.

Indigenous stewardship of coastal resources in native California

Indigenous people have profoundly influenced terrestrial and marine ecosystems by modifying coastal habitats to increase the productivity of target species and altering local biotas through their harvesting practices. In some cases, these actions led to local resource depression, while in other instances, Indigenous people engaged with terrestrial and marine resources in sustainable ways, increasing the resilience of ecosystems. In this paper, we interrogate human-environmental relationships that span the last ∼7,000 years of Indigenous engagement with coastal resources on the central California coast. Through a historical ecological framework, we assess how Indigenous peoples interacted with terrestrial and marine ecosystems differently across space and through time. In the Middle Holocene, the region’s archaeology is typified by mobile populations using diverse terrestrial and marine resources. By the Late Holocene, Indigenous peoples intensified their economies towards a limited number of marine and terrestrial species. During this time, Indigenous people initiated sustained fire management practices that created habitat mosaics still reflected in the contemporary landscape. In the Late Holocene, people also developed resource harvesting strategies for California mussels and forage fishes geared towards long-term productivity.

Three-way species interactions reverse the positive pairwise effects of two natives on an exotic invader

The disruptive effects of tertiary species on otherwise positive pairwise species interactions (e.g. context-dependent parasitism in pollinator syndromes) is well-known. However, few—if any—studies have investigated how invasive plants affect interactions between facilitative plants and their native plant communities. Further, if tertiary invasive species can change interactions among native species from positive to negative, then a tertiary native should be capable of the same phenom for pairwise interactions between natives and invasives. Our previous research indicates invasive black mustard (Brassica nigra) changes interaction signs for otherwise positive species interactions between the dominant, native facilitator California buckwheat (Eriogonum fasciculatum) and its co-dominant beneficiary California sagebrush (Artemisia californica) in semi-arid California coastal sage scrub habitat. Here, E. fasciculatum and A. californica seedlings increased B. nigra shoot growth in pairwise species interactions in the greenhouse. However, in three-way species interactions, E. fasciculatum and A. californica together reduced B. nigra SLA, height, and reproductive potential while not increasing shoot DW. In three-way species interactions, B. nigra did not significantly reduce E. fasciculatum facilitation of A. californica. Also surprisingly, light competition with B. nigra resulted in an increase in A. californica height, which reduced the negative effects of A. californica light competition on shade-intolerant E. fasciculatum. In an additive field experiment, A. californica protected E. fasciculatum from facilitating germination and growth of B. nigra when water competition was minimized. Taken together, this study demonstrates the importance of studying species interactions between competitive, native perennials in the current ecological context of invaded ecosystems.

We Are the Land: A History of Native California by Damon B.Akins and William J.BauerJr.Oakland: University of California Press, 2021. 384 pp.

We Are the Land: A History of Native California by Damon B.Akins and William J.BauerJr.Oakland: University of California Press, 2021. 384 pp.

Carbon farming can enhance pollinator resources

Native California bees and other wild pollinators, which are essential to many fruit and vegetable crops, are being threatened by climate change, pesticides and habitat degradation. Carbon farming, a set of practices that sequester carbon in the soil or woody biomass, can create habitat that supports these pollinators. This paper focuses on habitat management and farming practices that both increase carbon sequestration and benefit pollinator communities. By incentivizing and supporting conservation practices that incorporate carbon farming, we can protect wild pollinators and increase the resilience of California agriculture in the face of ongoing climate change.

Effects of Mustard Invasions on Soil Microbial Abundances and Fungal Assemblages in Southern California

Although mustards (family, Brassicaceae) are common across southern California, research has not focused on the effects of type-conversion of native California sage scrub (CSS) to areas dominated by invasive mustards. To better understand how mustard invasions, primarily the short-pod mustard, Hirschfeldia incana, impact soil microbial assemblages, we examined microbial abundance and assemblages from intact CSS and adjacent mustard-dominated soils at three sites. We also explored if germination rates for various plant species differed between CSS and mustard soils. We found that mustard invasions reduce soil microbial abundances by more than 50% and alter soil fungal assemblages. Fungal richness, diversity, and evenness did not differ between habitats, highlighting that these habitats harbor unique microbial assemblages. While mustard allelopathy is predicted to be the primary driver of these changes, mustard invasions also increased soil pH. Although functional consequences of these shifts are unknown, low mustard germination in CSS soils supports biological resistance to mustard invasion in CSS. Overall, our results demonstrate that mustard invasions, H. incana in particular, exert a strong selecting force on soil microbial assemblages, which can influence effective CSS restoration and preservation of ecosystem services.

We Are the Land: A History of Native California

Historians Damon Akins and William Bauer unveil a fascinating narrative about California Indians that breaks free from conventional boundaries of time and space. In this work, they argue that Indigenous people are central to the history and future of California as they continue to fight against the idea once held by colonial entities that abundant natural resources were meant to be exploited and “could not be Indigenous land” (p. 4). Akins and Bauer achieve their goal of correcting misconceptions about the history of Native California and of demonstrating that Indigenous peoples are still here despite the violence, slavery, genocide, and state policies perpetrated against them.The authors rely largely on secondary sources interspersed with oral histories of Indigenous people. The book is evenly divided in its coverage of topics, from pre-Hispanic Native practices, stories, and uses of the environment through Native peoples' struggles during the Spanish, Mexican, and American periods; the last four chapters are devoted to the twentieth century. The topics—from the interaction with explorers and settlers to governments, laws, and activists—range broadly enough to pique interest in many quarters. While some scholars may question the omission of notes and a bibliography, each chapter ends with a section on sources discussing interdisciplinary evidence and various debates. A pleasantly surprising aspect of the authors' methodology is the placement between chapters of so-called “Native Spaces” sections, which offer vignettes about Indigenous peoples in big cities and other important places in order to supplement the history of missions, ranches, and reservations. These sections weave the past and present together in the authors' attempt to “resist the erasure of California Indians” (p. 9).Many stories of violence, adaptation, and resistance emerge from the chapters and these “Native Spaces” sections. For example, the region around Yuma witnessed the Quechan fight over control of the Colorado and Gila River crossings against the Spanish and American conquests in 1781 and 1851, respectively; more recently established in the region were the Cocopah Casino, a hospital, and the Ten Tribes Partnership, which, by retaining possession of significant water rights to the Colorado River, makes Indigenous people “vital and powerful stakeholders” amid the dominance of agricultural, military, and transportation industries (p. 35). Other spaces have captured national headlines, such as Ishi Wilderness, established by the federal government in 1984. The wilderness area is near the town of Paradise, California, infamously destroyed in the 2018 Camp Fire—just the type of destructive wildfire that Native practices of burning, pruning, and harvesting, ignored under the 1964 Wilderness Act, would have helped to prevent. The authors point out that settlers who in the 1840s entered this area, which became known as the Lassen foothills, imagined it as a space that required conquering Indigenous peoples; by the twentieth century, convinced of their success, these settlers “grew nostalgic for an imagined past that could act as a prophylactic against the ills of the modern, urban world” (p. 195). Yet for the Native peoples this was not a wilderness; it was their land. These and many other accounts demonstrate how the public, politicians, and scholars would be better informed and have a greater understanding and appreciation of the natural environment if they were familiar with stories by Indigenous peoples.Indeed, this book's audience is not just other historians but the general public, though it would work well among college students. The authors intermittently refer to the history of Native California as one of genocide but also of resistance, perseverance, and survival in the present. Moreover, as they insightfully show, Indigenous peoples saw uplift in their own way, desiring “to take greater control over their lives, to live as both Indian and American” (p. 228). The authors' organization of the book and writing style are refreshing and make for a clear narrative that flows from start to finish. Anyone interested in the history of Indigenous peoples will wish to read and enjoy it.

Dietary characterization of the endangered salt marsh harvest mouse and sympatric rodents using DNA metabarcoding.

The salt marsh harvest mouse (Reithrodontomys raviventris; RERA) is an endangered species endemic to the coastal wetlands of the San Francisco Estuary, California. RERA are specialized to saline coastal wetlands, and their historical range has been severely impacted by landscape conversion and the introduction of non‐native plant and rodent species. A better understanding of their diet is needed to assess habitat quality, particularly in relation to potential competitors. We investigated three questions using DNA metabarcoding with ITS2 and trnL markers: (1) Do RERA specialize on the native plant, pickleweed (Salicornia pacifica), (2) Do RERA consume non‐native plants, and (3) What is the dietary niche breadth and overlap with three sympatric native and non‐native rodents? RERA diet was dominated by two plants, native Salicornia and non‐native salt bush (Atriplex spp.), but included 48 plant genera. RERA diet breadth was narrowest in fall, when they consumed the highest frequencies of Salicornia and Atriplex, and broadest in spring, when the frequencies of these two plants were lowest. Diet breadth was slightly lower for RERA than for co‐occurring species in pairwise comparisons. All four species consumed similarly high frequencies of wetland plants, but RERA consumed fewer grasses and upland plants, suggesting that it may be less suited to fragmented habitat than sympatric rodents. Diet overlap was lowest between RERA and the native California vole (Microtis californicus). In contrast, RERA diet overlapped substantially with the native western harvest mouse (R. megalotis) and non‐native house mouse (Mus musculus), suggesting potential for competition if these species become sufficiently abundant.

We Are the Land: A History of Native California

We Are the Land produces a seismic shift in its insistence that the history of California is the Indigenous history of California. Grafting Indigenous history onto previous narratives of California fails in these authors’ eyes. Keeping the two as distinct enterprises also fails. We Are the Land insists on seeing California as a brief moment in the history of Indigenous people, for whom California is but an episode: “People misunderstood the settler invasion of Indigenous California as California history rather than as an unsustainable and disruptive episode in it.” Instead of minimizing the American contribution to that disruption, much of the book takes place after the Gold Rush, serving to highlight America's contribution to genocide.Comprising ten chapters, this delivers an avalanche of facts, details, and nuance. The authors begin with Indigenous history prior to contact with Europeans, centering Indigenous knowledge, origin stories, and a holistic view of this time period in California. Looking at what has been called the “age of exploration,” the authors begin with beaches, riverbanks, and hillsides to see the moments of first encounter as an engagement of trade and movement into others’ tribal territories well before missionization. With the arrival of Spanish missions and missionaries, Indigenous people in California struggled to cope with disease and the domesticated livestock brought by Europeans which changed the Indigenous landscape, both of which presented a number of risks and opportunities for Indigenous people.Considering the Mexican period of 1811–1849, the authors suggest that Indigenous Californians leveraged their power, especially their labor power, during this period with Russian fur traders, American merchants, and Franciscan missionaries. For the American period of 1846–1873, the authors suggest using genocide as the only way to understand American relations with Indigenous people, but they also look closely at how Indigenous people of California used their power to resist and survive American genocide. From California statehood in 1859 through 1904, Indigenous people focused on creative ways of holding onto communal land in response to the definitively Anglo state's interest in acquiring access and title to all lands of California. From 1905–1928, the authors suggest that Native people in southern California fought allotment as a way of maintaining their communal land bases, while many northern California Indigenous communities embraced the policy to further their land claims, all of which constitutes a distinctive Indigenous legal and political activism.Identity acts as the central force in the period from 1928 through 1954, where the authors see a causality at work in legal and political activism leading to a cultivated Indigenous identity as California Indigenous people, coming together to sue the federal government for land theft. The period of 1953–1985 begins with the federal policy of termination and ends with the assertion of tribal self-determination among California Indigenous people. The authors include California tribes in their analysis here as well as the multi-tribal and multi-national protestors at Alcatraz. Both groups fought for land claims, prevention of dams, and the establishment of bingo halls. The book closes with the period of 1985 to the present, the authors document the fight among tribes, the state of California, the federal government, and private business groups to bring tribal gaming to tribal lands in California. Although it took two decades of struggle for the Cabazon Band of Mission Indians to secure the right to gaming, many other tribes followed suit, bringing in a huge revenue stream. Access to gaming funds has given tribal citizens the opportunity to reconnect and even relocate to tribal lands, and tribes gained the economic power to engage in land legislation, buy back tribal lands, and reassert tribal land rights.The authors provide vignettes of Indigenous viewpoints on spaces within California but also Europe. In an unusual move, they also provide extensive sources at the end of each chapter rather than a collection at the end of the book. Creating their own maps of California tribal lands and reservations of today and insisting on centering their stories on Indigenous knowledge and activism, We Are the Land makes a massive intervention in the field of Native history. This book is a powerful history of what is known as the state of California, giving scholars what they have needed for decades.

Hidden in Plain Sight: Detecting Invasive Species When They Are Morphologically Similar to Native Species

Early detection and rapid response (EDRR) can help mitigate and control invasive species outbreaks early on but its success is dependent on accurate identification of invasive species. We evaluated a novel outbreak in San Diego County, California of the Sonoran Spotted Whiptail (Aspidoscelis sonorae) in order to confirm their spread as well as quantify how to better detect and potentially manage this invasive species in California. We found that A. sonorae went undetected for over two years due to its morphological similarity to native whiptails and that it has spread rapidly since they were first observed. There are two species of native California whiptails with which A. sonorae can be confused locally, the Orange-throated Whiptail (Aspidoscelis hyperythrus), and to a lesser extent the Tiger Whiptail (Aspidoscelis tigris). We review key diagnostic features to distinguish A. sonorae from native California whiptails. We also discuss how to efficiently use widely available community science tools to rapidly assess a novel invasive species outbreak and outline suggestions to help manage cryptic invasive species.