Supplemental Material Supplemental methods For all species included in the study, leaf tissue samples were collected from 1-3 individuals, dried in silica gel and sent to the Smithsonian Institution’s 5 Laboratories for Analytical Biology for sequencing and phylogenetic reconstruction. Methods of DNA extraction, PCR and sequencing are reported in detail in Fazekas et al. (2012), and are summarized here. We disrupted leaf tissue that had been sorted into 96 well plates, and used glass fiber filtration to extract and purify DNA. PCR for three DNA barcode markers, rbcL, matK and psbA- 10 trnH, was conducted on each sample, and sequencing was done via the Sanger Sequencing protocol. Raw sequence data for each sample was assembled into a contig (by marker), edited and then verified for taxonomy by comparison with internally validated reference database using the program Geneious. Sequence data for each of the three markers were aligned separately, following Erickson & 15 Driskell (2012), and then the three aligned markers were concatenated into a 3 gene matrix for use in phylogenetic reconstruction. We submitted the data to the CIPRES portal (Miller et al. 2010) where we used GARLI (Zwickl 2008), a maximum likelihood phylogenetic reconstruction algorithm. We initiated 100 separate runs to evaluate variation in tree topology, and used the best scoring 20 maximum likelihood molecular phylogeny for subsequent analysis. For each of the 100 separate runs, we also used a phylogenetic constraint tree (see Kress et al. 1 2010) derived from the supertree web portal Phylomatic (Webb & Donoghue 2005), which uses the APGIII (The Angiosperm Phylogeny Group 2009) family level land plant phylogeny to generate a phylogeny that can be used to enforce 25 topological relationships. We used the constraint to enforce relationships among orders, but allowed the molecular data to infer lower-level topology and branch lengths throughout the phylogeny. The best scoring molecular phylogeny then was rooted and transformed into a dated chronogram using the program PATHd8 (Britton et al. 2007), and a set of dates derived from (Magallón & Castillo 2009) 30 for selected plant orders. References cited: 35 40 45 50 1. Britton, T., Anderson, C.L., Jacquet, D., Lundqvist, S. & Bremer, K. (2007). Estimating Divergence Times in Large Phylogenetic Trees. Syst. Biol., 56, 741– 752. 2. Erickson, D. & Driskell, A. (2012). Construction and Analysis of Phylogenetic Trees Using DNA Barcode Data. In: DNA Barcodes, Methods in Molecular Biology (eds. Kress, W.J. & Erickson, D.L.). Humana Press, pp. 395–408. 3. Fazekas, A.J., Kuzmina, M.L., Newmaster, S.G. & Hollingsworth, P.M. (2012). DNA Barcoding Methods for Land Plants. In: DNA Barcodes, Methods in Molecular Biology. pp. 223–252. 4. Kress, W.J., Erickson, D.L., Swenson, N.G., Thompson, J., Uriarte, M. & Zimmerman, J.K. (2010). Advances in the Use of DNA Barcodes to Build a 2 Community Phylogeny for Tropical Trees in a Puerto Rican Forest Dynamics Plot. PLoS ONE, 5, e15409. 55 60 65 70 75 5. Magallón, S. & Castillo, A. (2009). Angiosperm diversification through time. Am. J. Bot., 96, 349–365. 6. Miller, M.A., Pfeiffer, W. & Schwartz, T. (2010). Creating the CIPRES Science Gateway for inference of large phylogenetic trees. In: Gatew. Comput. Environ. Workshop GCE 2010. IEEE, pp. 1–8. 7. The Angiosperm Phylogeny Group. (2009). An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Bot. J. Linn. Soc., 161, 105–121. 8. Webb, C.O. & Donoghue, M.J. (2005). Phylomatic: tree assembly for applied phylogenetics. Mol. Ecol. Notes, 5, 181–183. 9. Zwickl, D.J. (2008). Genetic algorithm approaches for the phylogenetic analysis of large biological sequence datasets under the maximum likelihood criterion. 80 3 Table S1. Information on eight 1-ha study plots in northeastern Costa Rica. This table is modified from Table 1 of Chazdon et al. (2010) and Table S1 of Lasky et al. (2014). Plot name (abbreviation) El Bejuco (EB) Juan Enriquez (JE) Lindero Sur (LSUR) Tirimbina (TIR) Lindero El Peje secondary (LEPS) Cuatro Rios (CR) Year abandoned 1995 1995 1985 1982 1977 1972 Year sampling initiated 2005 2005 1997 1997 1997 1997 Location Chilamate Chilamate La Selva La Virgen La Selva La Virgen Latitude 10.46°N 10.46°N 10.41°N 10.40°N 10.43°N 10.39°N Longitude Surrounding landscape 84.06°W Pasture, oldgrowth and secondgrowth forest 84.07°W Pasture, oldgrowth and secondgrowth forest Old-growth and secondgrowth forest 84.03°W Pasture, plantations, and secondgrowth forest 84.11°W Old-growth and secondgrowth forest 84.03°W Pasture, secondgrowth and old-growth forest 84.13°W 4 Lindero El Peje primary (LEPP) Selva Verde (SV) Old-growth Old-growth 2005 2005 La Selva Chilamate 10.42°N 10.44°N Old-growth forest 84.04°W Pasture, secondgrowth and old-growth forest 84.07°W 85 5 90 Table S2. Estimated variance of random effects at the individual yearly quadrat observation level (“Obs”, εit in eqn. 6 of the main text), at the year level (“Year”, vt in eqn. 6 of the main text), and at the quadrat level (“Quadrat”, ui in eqn. 6 of the main text). Successional Diversity stage metric Total Δbiomass Obs. Growth Δbiomass Year Quadrat Obs. Mortality Δbiomass Year Quadrat Obs. Year Quadrat Early TD 0.168 0.078 0.287 0.099 0.041 0.232 0.224 0.083 0.239 Early PD 0.168 0.081 0.290 0.100 0.040 0.229 0.224 0.084 0.242 Early FDLDMC 0.167 0.083 0.288 0.100 0.038 0.232 0.225 0.087 0.240 Early FDSLA 0.166 0.081 0.290 0.099 0.039 0.230 0.223 0.084 0.241 Early FDWSG 0.164 0.084 0.281 0.099 0.037 0.222 0.223 0.087 0.241 Early FDAll traits 0.164 0.076 0.276 0.099 0.035 0.217 0.222 0.085 0.238 Mid TD 0.124 0.027 0.201 0.049 0.021 0.131 0.183 0.031 0.242 Mid PD 0.123 0.027 0.198 0.048 0.020 0.130 0.185 0.029 0.234 Mid FDLDMC 0.123 0.026 0.199 0.048 0.019 0.130 0.184 0.031 0.236 Mid FDSLA 0.122 0.027 0.203 0.048 0.021 0.131 0.184 0.031 0.240 Mid FDWSG 0.124 0.027 0.200 0.049 0.020 0.130 0.185 0.032 0.235 Mid FDAll traits 0.124 0.027 0.202 0.049 0.020 0.129 0.184 0.033 0.234 Old-growth TD 0.117 0.103 0.223 0.027 0.048 0.108 0.138 0.052 0.222 Old-growth PD 0.120 0.049 0.225 0.028 0.054 0.108 0.140 0.069 0.225 Old-growth FDLDMC 0.120 0.052 0.224 0.028 0.041 0.108 0.139 0.102 0.222 Old-growth FDSLA 0.119 0.058 0.224 0.028 0.040 0.109 0.139 0.074 0.224 Old-growth FDWSG 0.121 0.053 0.228 0.028 0.062 0.108 0.141 0.052 0.225 Old-growth FDAll traits 0.121 0.049 0.228 0.028 0.040 0.108 0.141 0.068 0.226 6 95 100 Table S3. Estimated coefficients of relating stand age category (covariate) to quadrat diversity metrics (response variables). Plots were categorized into three stand age categories and category was tested as an ordinal covariate effect on diversity (covariate values: early successional = 1, mid-successional = 2, old growth = 3). Here we show 95% credible intervals (CIs) of stand age category effects. All values are in SD(diversity)/age category. Significant covariates are shown in bold. Diversity metric 95% CI of stand age category effect Species richness Phylogenetic diversity FDLDMC FDSLA FDWSG FDAll traits 0.16, 0.23 0.20, 0.27 0.05, 0.12 0.11, 0.19 0.02, 0.09 -0.04, 0.04 7 105 Table S4. Standardized regression coefficients (with 95% credibility intervals) giving the effect of different diversity metrics on Δbiomass. Significant effects are highlighted in bold. Total Δbiomass and Δbiomass due to growth are in units of log(Δbiomass) SD(diversity)-1. Δbiomass due to mortality is in units of asin(Δbiomass 0.5) SD(diversity)-1. Slopes and 95% CIs of diversity effect on ΔAGB Successional stage Diversity metric Total Δbiomass Slope 2.50% 97.50% Growth Δbiomass Slope 2.50% 97.50% Mortality Δbiomass Slope 2.50% 97.50% Early Early Early Early Early Early TD PD FDLDMC FDSLA FDWSG FDAll traits 0.0275 0.0399 0.0471 0.0601 0.0272 0.0283 0.0113 0.0237 0.0327 0.0461 0.0077 0.0155 0.0434 0.0558 0.0612 0.0737 0.0430 0.0421 0.0218 0.0152 0.0288 0.0274 0.0245 0.0314 0.0111 0.0062 0.0188 0.0187 0.0125 0.0237 0.0317 0.0235 0.0389 0.0372 0.0370 0.0401 0.0226 0.0311 0.0253 0.0492 0.0199 -0.0426 0.0393 0.0474 0.0428 0.0652 0.0350 -0.0274 0.0036 0.0141 0.0076 0.0338 0.0033 -0.0594 Mid Mid Mid Mid Mid Mid TD PD FDLDMC FDSLA FDWSG FDAll traits -0.0298 -0.0053 -0.0155 -0.0245 -0.0078 -0.0136 -0.0439 -0.0177 -0.0281 -0.0370 -0.0214 -0.0293 -0.0161 0.0066 -0.0011 -0.0119 0.0048 0.0021 0.0132 0.0108 0.0065 0.0076 0.0103 0.0164 0.0066 0.0050 0.0011 0.0026 0.0049 0.0102 0.0202 0.0159 0.0116 0.0127 0.0156 0.0226 -0.0718 -0.0243 -0.0272 -0.0315 -0.0296 -0.0622 -0.0528 -0.0066 -0.0068 -0.0143 -0.0119 -0.0444 -0.0903 -0.0422 -0.0472 -0.0494 -0.0492 -0.0837 Old-growth Old-growth Old-growth Old-growth Old-growth Old-growth TD PD FDLDMC FDSLA FDWSG FDAll traits -0.0114 -0.0045 0.0077 0.0019 0.0026 -0.0143 -0.0450 -0.0320 -0.0189 -0.0261 -0.0291 -0.0446 0.0167 0.0276 0.0346 0.0380 0.0381 0.0144 -0.0020 0.0005 0.0043 -0.0045 0.0077 -0.0109 -0.0147 -0.0083 -0.0052 -0.0166 -0.0024 -0.0218 0.0101 0.0111 0.0126 0.0055 0.0183 0.0000 -0.0078 -0.0002 -0.0236 0.0092 -0.0031 0.0047 0.0313 0.0343 0.0071 0.0367 0.0318 0.0384 -0.0375 -0.0310 -0.0515 -0.0197 -0.0391 -0.0316 110 8 Figure S1. Molecular barcode phylogeny of species in our study, used to calculate community phylogenetic diversity. Variation in leaf dry matter content (LDMC) is represented from blue (low LDMC) to red (high LDMC). Species 115 lacking LDMC data are shown in black. Palms in our plots are shown in green but were excluded from analyses because of their distinct DBH-biomass allometry. Species not found in our plots were pruned from the tree. 9 Ardisia standleyana Pouteria reticulata Pouteria campechiana Pouteria tor Chry phyl ta lum venezu Pouteso ria elanense Pou durla C teraria calistonpdihi Eslecth starice ylla Lecyhweilceora Cocc this am longirnasis N chis p o N eea loba tuela r ck h Neeeea laamplifo li e e H a a im t e ii Mieniste delic viren r a s CMel qua ia c tula Iriar yoisosmratia gouncinn S o B o r t e p d ia n a P a cr a hila on en E h ctr ate de w nel sis W uteolidis ga exltoid arsclsmith e P l rp os as or ea ewic ii zii RPerrestfia r e ptachipaerhiz OOcohodseaoeaegiarecays ps a co t os a d tor ulc teea te me ec i h a ra a ce m ri u r le r on ca ren uc nu o na s ox a da p yl o n h ne ku nt hi an a ifera Ardisia fimbrillthum man m Aspidospermaades nu spruceace Aspidosperm rpuras ns Rauvolfia pu na arboreas aemonatapanameifnlosira Taberncm elle his parv cana La im rr eri xima Ch eanipa amm a G queria latifolieaa Poso queria occinnsis Poso iczia ncameensisis szewtis ppaanam ens is WaHr ippojo am ens la o a pan ian ico s Bor tria gu alid nsita cho rea ia c ndeela eri Psyalicouchotr a hootria oopiansa P sy are ch ia c ur lor a P x f e y uss Ps hotria lu ultriact oraor i Co yc tr m ib d l r Psychomeaarv alliobicwoyeaia s i u p Ps Faraea rdiardiaia dcopnthper o d m ra C CCo or ndar ysacoo Fa ra h x ca s c i t e Jathu V n oa r nd Ha Sa B y c og er By rso Ri lott on rs ni ch is y o m Cr ma nim a eriatrich a o Cr ton alcha c r throboogy P ot s o ra o v n SaMabausaon schiernessifpodata a pi e n m d oi ol a CoAlcho Al um ga ocdra ithieaandesia c t n u Alc cever neahornlancdiderniannuss hor iba co ea ulo ta ae neo ple sta la su lis Er y t m thro psi ios rice ifo li s xylu t m mPerafloribemonnsisa u Hir t acroparborndaa Mara e h e nthe Hir tllea triaynlluma s pa lla le dra nam ms e H ir llansisii Lica Hiair tella te s ediap hypom Couen p Dystovom ia polyalenuca paniculadra Symphonita ia globulife ta Garci intermedra Calophyllunia ia m brasilien se Marila pluricostata Vismia macrophylla Hi na ia rn a o 1 sh ris os sp ar t ulambr e s ea a h insa u ntlairen sis t n co te a dr isa ev O cocotetan mlaet ique a OO c ria a p ap nd da num NLeicaoteria ssaroriburopoona arria OLcicaariaea flmacntag chavta Liccoot teaa pemumspidaora a OOc ote mo cu cifl anth ala Ocinnarunaa paduidymssipet CSipaarun dia cra i ea ittier lla Sipernaangoris H nax ops rpicophya A non ia se nubli a U ylop sub ilionell X nona pap ginosa Annnonaria aeru folia A uatte mpli sis G uatteria alo G lauma g rien Ta la multiflora exicana Virompsoneura m Co hnyi Virola koscifera seb Virola colonen se Piper Hedyosmum scaberrimum Balizia elegans Stryphnodendro n microstachyum Inga venusta Inga le iocalycina Inga th ib au In di In ga marg ana In ga pez inata In ga speciztaifera bilis Inggaa cocle en In r I ga auizian sis I nga lba a Inngga oaecumin I a r a Znygga sumbsetediatna e SPeentaia gigr tuliflleifera a n POterm nacplethantifora o DAn ro s ap ra liol D u d caia ill ma a Swiptssiiraa in rpuvelutosa crolo e S ba Fi w ar ry maerms roina PFeic cuas r tztziax pa cro is hrii u p n i n r e s in a i c a m r o be to sipco ar e ph a nd idasta agu ns ylla hi uz ric e is ta sp ii en n s id si s i s ul a ia ur sp sis ia en a sis ed ian ag en ens lm gu is n ian sc dora ps gu cte enata eu ui leo um la biv cra a Ps aqucsim umpu olu os r M NBaro osimceas invacemicoloor BSr orophhi is rma bminignisolia arpa Trorop rouumaa ins tusif croc T u b a i Po uroop a o m osahulata PCoeccrroploi ceraspinp t is a ia s aamens Cempebrine s an ylla A olu ed ia C p r p oph a Ceascunaa machr loranth L uiin ma c ciosa oniana Q s spe mers ia Xyylo m R asneariaa csoylvestris Caaseari rocera C etia p rborea La seariapiattieri Caza Lo nia a aggregatum Lacisteamde flexiflora Rinore Vismia billbergiana Vismia baccifera C De alli c n Te dro arp rm pa a a Mi Mic ina na Ilex cu c o M li x m Mi onia nia icoa amarbsku ina co a m n a or tc ta p i Minia s penultisa afzoneuhs ii Mi co te d pi fin ia co nia ve icu ca is n Mi ia p nenr sialatata M QuMicoiconciaoniauncvt osnaa a n l V i Voc oc ea a d praelaata hys hys poly ors sinta ia ia c il a Syzguateferruhgroomba ygiu ma ine a Psid le m Eug ium jam nsisa Myrcenia haguajabvos m ia m s ple ea C Jacaraapparis pndenlisi Herratinaiadolichitatieri ula Apeiba m purpure embra nace a Goethalsia meianthaa Luehea se emannii Ceiba pen tandra Quararibea bracteolosa Quararibea ochrocalyx Hampea appendiculata bin Spondias mom feri s radlko Spondiagif dicas era inen si Man gu n ia m Tapiriram confusu u anamensneii Proutim p e v Proti Protiummrapittiesrisi u n la Proptianamem oulaarisa strisrana asn a ip br t g a Tetr Vouaseudonia gelarmusa s a p nia Cupsilospnertvaobileis a p p a u s Cu ylusTalisuim mgueonratlais h p a li r d n a a Allo phe ica a orio liat ta Neapa n dretlent a ciullaniaa r Ce ep are a b ido rp ra s u Ca ii u a ilia G uarea galocamaanse s ch G are op a kmen alise Tri b e t Gua rhrou m namen en u e d u ar imaxyl pa ci ig Gu S tho um a ocm d n yl e u Za ox tan str th an ir ia n Za V um H 10